Posts Tagged ‘anatomy’

This post was just published yesterday in a shorter, edited form in The Conversation UK, with the addition of some of my latest thoughts and the application of the editor’s keen scalpel. Check that out, but check this out too if you really like the topic and want the raw original version! I’ve changed some images, just for fun. The text here is about 2/3 longer.

Recently, the anatomy of animals comes up a lot, at least implicitly, in science news stories or internet blogs. Anatomy, if you look for it, is everywhere in organismal and evolutionary biology. The study of anatomy has undergone a renaissance lately, in a dynamic phase energized by new technologies that enable new discoveries and spark renewed interest. It is the zombie science, risen from what some had assumed was its eternal grave!

Stomach-Churning Rating: 4/10; there’s a dead elephant but no gore.

My own team has re-discovered how elephants have a false “sixth toe” that has been a mystery since it was first mentioned in 1710, and we’ve illuminated how that odd bit of bone evolved in the elephant lineage. This “sixth toe” is a modified sesamoid kind of bone; a small, tendon-anchoring lever. Typical mammals just have a little nubbin of sesamoid bone around their ankles and wrists that is easily overlooked by anatomists, but evolution sometimes co-opts as raw material to turn into false fingers or toes. In several groups of mammals, these sesamoids lost their role as a tendon’s lever and gained a new function, more like that of a finger, by becoming drastically enlarged and elongated during evolution. Giant pandas use similar structures to grasp bamboo, and moles use them to dig. We’ve shown that elephants evolved these giant toe-like structures as they became larger and more terrestrial, starting to stand up on tip-toe, supported by “high-heels” made of fat. Those fatty heels benefit from a stiff, toe-like structure that helps control and support them, while the fatty pads spread out elephants’ ponderous weight.

Crocodile lung anatomy and air flow, by Emma Schachner.

Crocodile lung anatomy and air flow, by Emma Schachner.

I’ve also helped colleagues at the University of Utah (Drs. Emma Schachner and Colleen Farmer) reveal, to much astonishment, that crocodiles have remarkably “bird-like” lungs in which air flows in a one-way loop rather than tidally back and forth as in mammalian lungs. They originally discovered this by questioning what the real anatomy of crocodile lungs was like- was it just a simple sac-like structure, perhaps more like the fractal pattern in mammalian lungs, and how did it work? This question bears directly on how birds evolved their remarkable system of lungs and air sacs that in many ways move air around more effectively than mammalian lungs do. Crocodile lungs indicate that “avian” hallmarks of lung form and function, including one-way air flow, were already present in the distant ancestors of dinosaurs; these traits were thus inherited by birds and crocodiles. Those same colleagues have gone on to show that this feature also exists in monitor lizards, raising the question (almost unthinkable 10-20 years ago) of whether those bird-like lungs are actually a very ancient and common feature for land animals.

Speaking of monitor lizards, anatomy has revealed how they (and some other lizards) all have venom glands that make their bites even nastier, and these organs probably were inherited by snakes. For decades, scientists had thought that some monitor lizards, especially the huge Komodo dragons, drooled bacteria-laden saliva that killed their victims with septic shock. Detailed anatomical and molecular investigations showed instead that modified salivary glands produced highly effective venom, and in many species of lizards, not just the big Komodos. So the victims of numerous toothy lizard species die not only from vicious wounds, but also from worsened bleeding and other circulatory problems promoted by the venomous saliva. And furthermore, this would mean that venom did not evolve separately in the two known venomous lizards (Gila monster and beaded lizard) and snakes, but was inherited from their common ancestor and became more enhanced in those more venomous species—an inference that general lizard anatomy supports, but which came as a big surprise when revealed by Bryan Fry and colleagues in 2005.

There’s so much more. Anatomy has recently uncovered how lunge-feeding whales have a special sense organ in their chin that helps them detect how expansive their gape is, aiding them to engulf vast amounts of food. Scientists have discovered tiny gears in the legs of leafhoppers that help them make astounding and precise leaps. Who knew that crocodilians have tiny sense organs in the outer skin of their jaws (and other parts of their bodies) that help them detect vibrations in the water, probably aiding in communication and feeding? Science knows, thanks to anatomy.

Just two decades or so ago, when I was starting my PhD studies at the University of California in Berkeley, there was talk about the death of anatomy as a research subject; both among scientists and the general public. What happened? Why did anatomy “die” and what has resuscitated it?


TH Huxley, anatomist extraordinaire

TH Huxley, anatomist extraordinaire, caricatured in a lecture about “bones and stones, and such-like things” (source)

Anatomy’s Legacy

In the 16th through 19th centuries, the field of gross anatomy as applied to humans or other organisms was one of the premier sciences. Doctor-anatomist Jean Francois Fernel, who invented the word “physiology”, wrote in 1542 that (translation) “Anatomy is to physiology as geography is to history; it describes the theatre of events.” This theatric analogy justified the study of anatomy for many early scientists, some of whom also sought to understand it to bring them closer to understanding the nature of God. Anatomy gained impetus, even catapulting scientists like Thomas Henry Huxley (“Darwin’s bulldog”) into celebrity status, from the realisation that organisms had a common evolutionary history and thus their anatomy did too. Thus comparative anatomy became a central focus of evolutionary biology.

But then something happened to anatomical research that can be hard to put a finger on. Gradually, anatomy became a field that was scoffed at as outmoded, irrelevant, or just “solved”; nothing important being left to discover. As a graduate student in the 1990s, I remember encountering this attitude. This apparent eclipse of anatomy accelerated with the ascent of genetics, with anatomy reaching its nadir in the 1950s-1970s as techniques to study molecular and cellular biology (especially DNA) flourished.

One could argue that molecular and cellular biology are anatomy to some degree, especially for single-celled organisms and viruses. Yet today anatomy at the whole organ, organism or lineage level revels in a renaissance that deserves inspection and reflection on its own terms.


Anatomy’s Rise

Surely, we now know the anatomy of humans and some other species quite well, but even with these species scientists continue to learn new things and rediscover old aspects of anatomy that laid forgotten in classic studies. For example, last year Belgian scientists re-discovered the anterolateral ligament of the human knee, overlooked since 1879. They described it, and its importance for how our knees function, in novel detail, and a lot of media attention was drawn to this realisation that there are some things we still don’t understand about our own bodies.

A huge part of this resurgence of anatomical science is technology, especially imaging techniques- we are no longer simply limited to the dissecting knife and light microscope as tools, but armed with digital technology such as 3-D computer graphics, computed tomography (series of x-rays) and other imaging modalities. Do you have a spare particle accelerator? Well then you can do amazing synchrotron imaging studies of micro-anatomy, even in fairly large specimens. Last year, my co-worker Stephanie Pierce and colleagues (including myself) used this synchrotron approach to substantially rewrite our understanding of how the backbone evolved in early land animals (tetrapods). We found that the four individual bones that made up the vertebrae of Devonian tetrapods (such as the iconic Ichthyostega) had been misunderstood by the previous 100+ years of anatomical research. Parts that were thought to lie at the front of the vertebra actually lay at the rear, and vice versa. We also discovered that, hidden inside the ribcage of one gorgeous specimen of Ichthyostega, there was the first evidence of a sternum, or breastbone; a structure that would have been important for supporting the chest of the first land vertebrates when they ventured out of water.

Recently, anatomists have become very excited by the realization that a standard tissue staining solution, “Lugol’s” or potassium iodide iodine, can be used to reveal soft tissue details in CT scans. Prior to this recognition, CT scans were mainly used in anatomical research to study bone morphology, because the density contrast within calcified tissues and between them and soft tissues gives clearer images. To study soft tissue anatomy, you typically needed an MRI scanner, which is less commonly accessible, often slower and more expensive, and sometimes lower resolution than a CT scanner. But now we can turn our CT scanners into soft tissue scanners by soaking our specimens in this contrast solution, allowing highly detailed studies of muscles and bones, completely intact and in 3D. Colleagues at Bristol just published a gorgeous study of the head of a common buzzard, sharing 3D pdf files of the gross anatomy of this raptorial bird and promoting a new way to study and illustrate anatomy via digital dissections- you can view their beautiful results here. Or below (by Stephan Lautenschlager et al.)!


These examples show how anatomy has been transformed as a field because we now can peer inside the bodies of organisms in unprecedented detail, sharing and preserve those data in high-resolution digital formats. We can do this without the concern that a unique new species from Brazilian rainforests or exciting fossil discovery from the Cambrian period would be destroyed if we probed certain questions about its anatomy that are not visible from the outside– a perspective in which science had often remained trapped for centuries. These tools became rapidly more diverse and accessible from the 1990s onward, so as a young scientist I got to see some of the “before” and “after” influences on anatomical research—these have been very exciting times!

When I started my PhD in 1995, it was an amazing luxury to first get a digital camera to use to take photographs for research, and then a small laser scanner for making 3D digital models of fossils, with intermittent access to a CT scanner in 2001 and now full-time access to one since 2003. These stepwise improvements in technology have totally transformed the way I study anatomy. In the 1990s, you dissected a specimen and it was reduced to little scraps; at best you might have some decent two-dimensional photographs of the dissection and some beetle-cleaned bones as a museum specimen. Now, we CT or MRI scan specimens as routine practice, preserving many mega- or gigabytes of data on its internal and external, three-dimensional anatomy in lush detail, before scalpel ever touches skin. Computational power, too, has grown to the point where incredibly detailed 3D digital models produced from imaging real specimens can be manipulated with ease, so science can better address what anatomy means for animal physiology, behaviour, biomechanics and evolution. We’re at the point now where anatomical research seems no longer impeded by technology– the kinds of questions we can ask are more limited by access to good anatomical data (such as rare specimens) than by the ways we acquire and use those data.

My experience mirrors my colleagues’. Larry Witmer at Ohio University in the USA, past president of the International Society for Vertebrate Morphologists, has gone from dissecting bird heads in the 1990s to becoming a master of digital head anatomy, having collected 3D digital scans of hundreds of specimens, fossil and otherwise. His team has used these data to great success, for example revealing how dinosaurs’ fleshy nostrils were located in the front of their snouts (not high up on the skull, as some anatomists had speculated based on external bony anatomy alone). They have also contributed new, gorgeous data on the 3D anatomy of living animals such as opossums, ostriches, iguanas and us, freely available on their “Visible Interactive Animal” anatomy website. Witmer comments on the changes of anatomical techniques and practice: “For extinct animals like dinosaurs, these approaches are finally putting the exploration of the evolution of function and behavior on a sound scientific footing.

I write an anatomy-based blog called “What’s in John’s Freezer?” (haha, so meta!), in which I recount the studies of animal form and function that my research team and others conduct, often using valuable specimens stored in our lab’s many freezers. I started this blog almost two years ago because I noticed a keen interest, or even hunger for, stories about anatomy amongst the general public; and yet few blogs explicitly were about anatomy for its own sake. This interest became very clear to me when I was a consultant for the BAFTA award-winning documentary series “Inside Nature’s Giants” in 2009, and I was noticing more documentaries and other programmes presenting anatomy in explicit detail that would have been considered too risky 10 years earlier. So not only is anatomy a vigorous, rigorous science today, but people want to hear about it. Just in recent weeks, the UK has had “Dissected” as two 1-hour documentaries and “Secrets of Bones” as back-to-back six 30-minute episodes, all very explicitly about anatomy, and on PRIME TIME television! And PBS in the USA has had “Your Inner Fish,” chock full of anatomy. I. Love. This.

Before the scalpel: the elephant from Inside Nature's Giants

Before the scalpel: the elephant from Inside Nature’s Giants

There are many ways to hear about anatomy on the internet these days, reinforcing the notion that it enjoys strong public engagement. Anatomical illustrators play a vital role now much as they did in the dawn of anatomical sciences– conveying anatomy clearly requires good artistic sensibilities, so it is foolish to undervalue these skills. The internet age has made disseminating such imagery routine and high-resolution, but we can all be better about giving due credit (and payment) to artists who create the images that make our work so much more accessible. Social media groups on the internet have sprung up to celebrate new discoveries- watch the Facebook or Twitter feeds of “I F@*%$ing Love Science” or “The Featured Creature,” to name but two popular venues, and you’ll see a lot of fascinating comparative animal anatomy there, even if the word “anatomy” isn’t necessarily used. I’d be remiss not to cite Emily Graslie’s popular, unflinchingly fun social media-based explorations of gooey animal anatomy in “The Brain Scoop”. I’d like to celebrate that these three highly successful disseminators of (at least partly) anatomical outreach are all run by women—anatomical science can (and should!) defy the hackneyed stereotype that only boys like messy stuff like dissections. There are many more such examples. Anatomy is for everyone! It is easy to relate to, because we all live in fleshy anatomical bodies that rouse our curiosity from an early age, and everywhere in nature there are surprising parallels with — as well as bizarre differences from — our anatomical body-plans.


Anatomy’s Relevance

What good is anatomical knowledge? A great example comes from gecko toes, but I could pick many others. Millions of fine filaments, modified toe scales called setae, use micro-molecular forces called van der Waals interactions to help geckos cling to seemingly un-clingable surfaces like smooth glass. Gecko setae have been studied in such detail that we can now create their anatomy in sufficient detail to make revolutionary super-adhesives, such as the product “Geckskin”, 16 square inches of which can currently suspend 700 pounds aloft. This is perhaps the most famous example from recent applications of anatomy, but Robert Full’s Poly-Pedal laboratory at Berkeley, among many other research groups excelling at bio-inspired innovation in robotics and other fields of engineering and design, regularly spins off new ideas from the principle that “diversity enables discovery”, as applied to the sundry forms and functions found in organisms. By studying the humble cockroach, they have created new ways of building legged robots that can scour earthquake wreckage for survivors or explore faraway planets. By asking “how does a lizard use its big tail during leaping?” they have discovered principles that they then use to construct robots that can jump over or between obstacles. Much of this research relates to how anatomical traits determine the behaviours that a whole, living, dynamic organism is capable of performing.

Whereas when I was a graduate student, anatomists and molecular biologists butted heads more often than was healthy for either of them, competing for importance (and funding!), today the scene is changing. With the rise of “evo devo”, evolutionary developmental biology, and the ubiquity of genomic data as well as epigenetic perspectives, scientists want to explain “the phenotype”—what the genome helps to produce via seemingly endless developmental and genetic mechanisms. Phenotypes often are simply anatomy, and so anatomists now have new relevance, often collaborating with those skilled in molecular techniques or other methods such as computational biology. One example of a hot topic in this field is, “how do turtles build their shells and how did that shell evolve?” To resolve this still controversial issue, we need to know what a shell is made of, what features in fossils could have been precursors to a modern shell, how turtles are related to other living and extinct animals, how a living turtle makes its shell, and how the molecular signals involved are composed and used in animals that have or lack shells. The first three questions require a lot of anatomical data, and the others involve their fair share, too.

Questions like these draw scientists from disparate disciplines closer together, and thanks to that proximity we’re inching closer to an answer to this longstanding question in evolutionary biology and anatomy, illustrated above in the video.  As a consequence, the lines between anatomists and molecular/cellular biologists increasingly are becoming blurred, and that synthesis of people, techniques and perspectives seems to be a healthy (and inevitable?) trend for science. But there’s still a long way to go in finding a happy marriage between anatomists and the molecular/cellular biologists whose work eclipsed theirs in past decades. Old controversies like “should we use molecules or morphology to figure out how animals are related to each other?” are slowly dying out, as the answer becomes evident to be “Yes. Both.” (especially when fossils can be included!) Such dwindling controversies contribute to the healing of disciplinary rifts and the unruffling of parochial feathers.

Yet many anatomists would point to lingering obstacles that give them concern for their future; funding is but one of them (few would argue that gross anatomical research is as well off in provision of funding as genetics is, for example). There are clear mismatches between the hefty importance, vitality, popularity and rigour of anatomical science and its perception or its role in academia.

Romane 1892, covering Haeckel's classic, early evo-devo work (probably partly faked, but still hugely influential)

Romane 1892, covering Haeckel’s classic, early evo-devo work (probably partly faked, but still hugely influential) (source)


Anatomy’s Future

One worry the trend that anatomy as a scientific discipline is clearly flourishing in research while it dwindles in teaching. Fewer and fewer universities seem to be teaching the basics of comparative anatomy that were a mainstay of biology programmes a century ago. Yet anatomy is everywhere now in biology, and in the public eye. It inspires us with its beauty and wonder—when you marvel at the glory of beholding a newly discovered species, you are captivated by its phenotypic pulchritude. Anatomy is still the theatre in which function and physiology are enacted, and the physical encapsulation of the phenotype that evolution moulds through interactions with the environment. But there is cause for concern that biology students are not learning much about that theatre, or that medical schools increasingly seem to eschew hands-on anatomical dissection in favour of digital learning. Would you want a doctor to treat you if they mainly knew human anatomy from a CGI version on an LCD screen in medical school, and hence were less aware of all the complexity and variation that a real body can house?

Anatomy has an identity problem, too, stemming from decades of (Western?) cultural attitudes (e.g. the “dead science” meme) and from its own success—by being so integral to so many aspects of biology, anatomy seems to have integrated itself toward academic oblivion, feeding the perception of its own obsolescence.  I myself struggled with what label to apply to myself as an early career researcher- I was afraid that calling myself an “anatomist” would render me quaint or unambitious in the eyes of faculty job interview panels, and I know that many of my peers felt the same. I resolved that inner crisis years ago and came to love identifying myself at least partly as an anatomist. I settled on the label “evolutionary biomechanist” as the best term for my speciality. In order to reconstruct evolution or how animals work (biomechanics), we first often need to describe key aspects of anatomy, and we still discover new, awesome things about anatomy in the process. I still openly cheer on anatomy as a discipline because its importance is so fundamental to what I do, and I am far from alone in that attitude. Other colleagues that do anatomical research use other labels for themselves like “biomechanist”, “physiologist,” or “palaeontologist”, because those words better capture the wide range of research and teaching that they do, but I bet also because some of them likely still fear the perceived stigma of the word “anatomy” among judgemental scientists, or even the public. At the same time, many of us get hired at medical, veterinary or biology schools/departments because we can teach anatomy-based courses, so there is still hope.

Few would now agree with Honoré de Balzac’s 19th century opinion that “No man should marry until he has studied anatomy and dissected at least one woman”, but we should hearken back to what classical scientists knew well: it is to the benefit of science, humanity and the world to treasure the anatomy that is all around us. We inherit that treasure through teaching; to abscond this duty is to abandon this trove. With millions of species around today and countless more in the past, there should always be a wealth of anatomy for everyone to learn from, teach about, and rejoice.

X-ray technology has revolutionized anatomical studies; what's next? Ponder that as this ostrich wing x-ray waves goodbye.

X-ray technology has revolutionized anatomical studies; what’s next? Ponder that as this ostrich wing x-ray waves goodbye.

Like this post? You might also find my Slideshare talk on the popularity of anatomy interesting- see my old post here for info!

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I’ve described our “Walking the Cat Back” Leverhulme Trust-funded project with Dr. Anjali Goswami and colleagues before, but today we really got stuck into it. We’re dissecting a 46kg male Snow Leopard (Panthera uncia) as the first “data point” (actually several hundred data points, but anyway, first individual) in our study of how limb and back muscles change with size in felids. No April Fools’ pranks here; real science-as-it-happens.

Stomach-Churning Rating: 7/10 for skinned leopard and globs of fat. Much worse in person, hence the downgrading from what could be a higher score. Don’t click the photos to emkitten them if you don’t want to see the details.

This leopard is the same one that Veterinary Forensics blogged about. It died in a UK cat conservation/recovery centre. Today is simply a short post, but it is the first in what will surely be a continued series of posts on felid postcranial anatomy and musculoskeletal biomechanics by our felid research team, with bits of natural history and evolution thrown in when we can manage. As befits one of my curt “Anatomy Vignette” posts, pictures will tell the story.

Skinned and mostly de-fatted snow leopard, with fat piled up on the lower left hand corner near the hind feet. Here we are identifying and then removing and measuring the individual muscles. Project postdoc Andrew Cuff is hard at work on the forelimb while I'm mucking around with the hindlimb.

Skinned and mostly de-fatted snow leopard, with fat piled up on the lower left hand corner near the hind feet. Here we are identifying and then removing and measuring the individual muscles. Project postdoc Andrew Cuff is hard at work on the forelimb while I’m mucking around with the hindlimb. The fat here is about 3kg subcutaneous fat, so around 6.5% of body mass. And as the cat has been around for a while, that fat has gone a bit rancid and that is not nice. Not nice at all, no… Usually smells do not bother me, but this took some adjustment. Fortunately, the muscles are still OK, and work is coming along well.

UCL PhD student Marcela Randau,, carving up our cat's limb muscles. As usual in comparative biomechanics, we measure the "architecture"- parameters of the muscle that relate in a somewhat straightforward fashion to function.

UCL PhD student Marcela Randau, carving up our cat’s limb muscles. As usual in comparative biomechanics, we measure the “architecture”- parameters of the muscle that relate in a somewhat straightforward fashion to function. This muscular architecture includes things like muscle mass, the lengths of the fibers (fascicles) that make up the muscles, and the angle of the fascicles to the muscle’s line of action. These parameters correlate reasonably well with the force and power that the muscle can develop, and its working range of length change. Other posts here have discussed this more, but by measuring the architecture of many muscles in many felids of different sizes, we can determine how felids large and small adapt their anatomy to support their bodies and move their limbs. This will help to solve some lingering mysteries about the odd ways that cats move and how their movement changes with body size.

This research is being driven forward mainly by Andrew and Marcela, shown above, so I wanted to introduce them and our odoriferous fat cat. Upcoming dissections: 1-2 more snow leopards, tiger, various lions, ocelot, black-footed cat, leopard, and a bunch of moggies, and whatever else comes our way. All were EU zoo/park mortalities (there are a LOT of big cats out there!).

EDIT: Had to add a photo of the CLAWS! Whoa dude.


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Hey I almost forgot, it’s the blog’s second anniversary! What the hell happened this year?

Stomach-Churning Rating: there’s an 8/10 photo of ostrich guts here; otherwise 2/10ish.

I bring you tidings from the past and future!

I bring you tidings from the past and future!

This was the Year of the Rant, and I enjoyed ranting to you on this blog. Sometimes you ranted with me, and that was even better. It kicked off with that cat documentary that spurned me in a feline dismissive fashion, then I lit off on documentaries in general and how they should give more back to scientists (what a discussion in the comments!!!!). Ooooh that felt good. And helped me sort out my thoughts about the topic. And after then, I got paid more often and still did a lot of documentaries– if you haven’t been watching Secrets of Bones on BBC4, you should be weeping bitter, bitter dregs (and be scrambling to get access). Catch me tomorrow (Tues) night with some of our emus! They paid me reasonably and in return I worked hard for them; before, during, and after filming, and I think we all felt good about it. Or I did anyway. The show is excellent, so I feel even better!

Sneak peek from BBC4's Secrets of Bones episode 3... recognize anyone?

Sneak peek from BBC4′s Secrets of Bones episode 3… recognize anyone? (from their website)

But no ranting palaeo-related blog would be complete without a good T. rex rant, and I did that this year. Took a big dump on the scavenger-predator non-troversy. That went over so well, Slate picked it up- I never had expected that to happen! I also appreciated how many colleagues joined in to condemn the senseless perpetuation of this dead issue by the media and a few scientists.

There were also some posts on more introspective things, like the feeling of being lost that pervades both visiting a strange foreign city and doing science. And like how science needs both the qualities of a Mr Spock and a Captain Kirk. Those were fun experiments in combining  a personal, internal experience with a broader message.

Darwin greets Chinese visitor Microraptor in my office.

Darwin greets Chinese visitor Microraptor in my office.

When I asked for suggestions last year, you wanted more coverage of other people’s stuff, and so I did that to a degree, reviewing the All Yesterdays and Unfeathered Bird books. And then I fell off that wagon, which I may come back to. But along the way I realized I don’t enjoy writing about papers that other people have already published because, generally, I then lack the personal experience of doing the science and showing it in progress, which is what this blog tends to be about and what excites me on a personal, visceral level. Once the paper is out, I feel like the cat is out of the bag and it’s not as fun to talk about unless it’s totally mind-blowingly (A) cool or (B) idiotic. Anyway, I might do a solicited post if someone gets me excited about a paper before it comes out, or who knows, I may change my mind.

Entirely unfeathered Indian peafowl in matching views.

Entirely unfeathered Indian peafowl in matching views, with Unfeathered Bird’s author-illustrator.

I also posted on a fabulous blog that more people need to hit, because you may be surprised just how fascinating it is- Veterinary Forensics. I get the feeling often, both on my blog and from scientific colleagues, that veterinary anatomy/pathology issues are seen as “lesser science” than basic, even descriptive anatomy. Somehow, insanely weird diseases or pathologies don’t excite people as much as insanely weird “normal” anatomies. I know there are exceptions to that generalization, but I think it’s a common (mis)perception people have, and part of it is likely because those fields (veterinary medicine and zoology, for example) are historically separate, and people tend to see anatomy and pathology as separate things- as opposed to points along a continuum. Since coming to the RVC, I have come from that kind of a misperception to one in which pathology enormously enriches my understanding of form, function and evolution. I also love the “applications of basic science to helping animals live better lives” angle. We should all be trying to do that as scientists, but from time to time I notice that it isn’t taken seriously (I even get reviewers’ comments bluntly stating that it’s none of our business as basic scientists, or for anatomy/experimental biology journals to mention!). Whoops better stop there or I’ll be writing a new ranty post!

Can't get enough of this -xray GIF, so here it is again.

Can’t get enough of this x-ray GIF, so here it is again.

Darwin Day got into some of the vet-y issues regarding feet, in a post on hooves and then another on pigs’ feet.

Toward the end of the year I got some guest posts going, by two main people from my team: Sophie Regnault on rhino feet, and Julia Molnar on crocodile spines. I liked those posts a lot, and so did you, it seems, so there will be more of those coming in year 3. Quite a few are planned already.

One of my favourite papers I’ve ever done came out this year, by Vivian Allen et al. on dinosaur body shape/postural evolution, and that went nicely as a blog post with tons of extra context and stuff. Digital 3D dinos, what’s not to love?

I was on sabbatical for much of the year, so I was posting a lot about patellae (kneecaps) and how fun they are to study, which led to posts about basal bird skeletons and more, like Darwin’s chickens and a joke about cake that only I seemed to find funny, and ending with a grand summary of avian kneecaps. I also reported on some new (post-sabbatical) research, still ongoing, with Dr. Stephanie Pierce and Dr. Maedeh Borhani at the RVC, on how salamanders walk. During Freezermas, I plugged our new comparative cat project.

The mesenteries are so gorgeous!!!!!!

The mesenteries are so gorgeous!!!!!!

Speaking of Freezermas: It happened, it was terrifying, and we’ve all grown from the experience of surviving it. I had a blast dissecting that ostrich, and the x-ray pics were a hit with everyone, too!

Then there was random “freezer love” and assorted posts to give insight into the daily life of a freezer manager, such as doing an inventory and reflections on childhood. I snuck in a tour of Dublin museums and the amazing Crocodiles of the World near Oxford. I meant to do more of those “anatomy road trip posts” and still aim to.

And we ended the year by ending the ongoing drama of the Mystery Anatomy competition, starting off a new year with a new scoreboard. We got more poetic and lyrical in 2013 with the answers to those mysteries, and that will continue (groans from those who are poetically challenged).

Elephant skull mystery x-ray

Elephant skull mystery x-ray

Some brief numbers: view-wise the blog has been pretty close to last year; about 87,000 views in the past 12 months for a total of almost 200,000, wow! This year, Twitter just barely edged out Facebook for bringing people to the blog (3,134 vs 3,022 clicks) but then geenstijl.nl bizarrely brought 2,732! There was no big Reddit or other social media site moment this year, but various sites and links continued to bring in a steady flow of visitors to add to the Google-search-firehose’s. Thanks to folks who linked here!!!

What google searches brought people here the most often? The top 3 are the most interesting; the fifth one just makes me laugh because I’ve never discussed Deepstaria enigmatica anatomy here, but will continue to promote people finding the site by searching for it, if only to annoy cnidariologists:

rhino 83
giraffe 76
camel anatomy 62
what’s in john’s freezer 60
deepstaria enigmatica 56

I’m a little surprised “elephant” and “dinosaur” don’t bring as many searches here, but there are probably more sites about those animals and hence I get fewer of the hits. Looking forward to more hits on “ostrich anatomy”…

My two top rants were the top posts this year, and that’s no surprise given the comments and other attention they got. Thanks for helping by participating! Those were nice group-rants. Healthy and vigorous. Shockingly, a poetry round of mystery anatomy came in 3rd! People just liked the chickens + bones + poetry. Those, and some hits from year 1, broke the 1000-views marks.

Americans came here in a 3:1 ratio to Brits, which means that Brits punched above their weight per capita (~5:1 ratio)! Canadians, you tried, too. Here, have some back bacon of dubious provenance. :) Saint Kitts and Nevis with 670 views, wow! Very unexpected- you beat Italy and many others!

Most importantly, the blog has been about sharing my passion for anatomy (as preserved via freezers). I shared a conference talk about this subject here, using the blog as a prime example, to a warm reception. I want to try experimenting in new ways to use the blog to share things this year. I think you will like what I (we!) have lined up. Thanks for showing up and staying with me!

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I Can’t Remember Freezermas…
Can’t Tell Dissection from a CT.
Deep down Inside I Feel to Freeze.
These Wonderful Scenes of Anatomy!
Now That the Week Is Through with Me,
I’m Waking up; Ratites I see
And There’s Not Much Left of These:
Nothing remains but bones now

(digested from Metallica’s “One“, in …And Justice For All, the pummeling, slickly produced, huge-sounding, Jason Newsted-bass-playing leviathan of a thematic album (1988). It was all downhill for Metallica after this one, but it was a good year for rock! The song is about a soldier who had traumatic injuries and was left paralyzed, “locked-in” to his own mind. Themes/footage from “Johnny Got His Gun” (1939 book/1971 movie) are interspersed. Did you see this track coming? If so, you’re just as demented as I am; congrats!)

And so another year ends; we’re at the final post of Freezermas 2014: The Concept Album. We had 7 tracks involving leitmotifs of ostriches and cats and 2 vs. 4 legs, and CTs and x-rays, and epic dissections, and disturbing pathologies, and some twisted lyrics that mangled classic albums. There are so many more concept albums I could have touched on- great ones by Rush, Yes, Savatage, Helstar, Mastodon… many more. But I’ll give you a chance to sit in the DJ’s seat in this post!

Stomach-Churning Rating: 6/10. Some internal organs.

Today’s one mystery dissection photo is of two things, and the Mystery Anatomy challenge is to identify both (the 2-part brown thing and the 1-part whitish thing). They are from our friend the ostrich.

Your task is to weave your answer into the lyrics of a song from any concept album (2 lines or more)- you must identify the song, artist and album with your answer so we can figure out the tune. Any genre is OK as long as it is clearly a concept album (music, that is). You have freedom. Use it wisely! As always, bonus points for extra cleverness.


We’ll let Maytagtallica sing us out:

♫Hold my breath as I wait for points
Oh Please John, blog more?♫


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And I post my blog and stare
Into x-rays of an ostrich
I’ve always known that radiographs never lie
People always say “that’s cool”
To see x-rays of an ostrich
So keen to know what
Lies behind the skin

(evolved from “Eyes of A Stranger” by Queensrÿche, from the epic masterpiece of Operation: Mindcrime (1988). One of my favourite albums of all time, and a fantastic concept album too. The band was operating at their peak. Tight! Drug addict Nikki gets brainwashed by the evil Dr. X and made to assassinate a nun, Sister Mary, who was a prostitute, and then there’s like a revolution or something, and things get all screwed up and no one ends up happy – or alive. All the while, Geoff Tate is singing his guts out. Anyway, I got to see them play the whole album live in 1990 in Madison, WI, for the filming of Operation: Livecrime, which was like a Mecca moment for me back then. Look for me (pre-bald years) in about the 6th row. )

What does that album have to do with the number 2 (two days left in Freezermas)? Hmm… Track 2 is the instrumental Anarchy-X, and today’s post is about X-rays as well as that funky ostrich (2 legs good! 2 toes good, too!) again, so I’m satisfied, and by this point you’re probably just oggling the mind-blowing images below anyway, so fuck it!

Stomach-Churning Rating: 2/10; just X-rays.

Tech/MRes Kyle Chadwick, Renate Weller and the equine imaging team at the RVC took these x-rays of our birdie for us and for an artist who is doing a big x-ray animal art show (more news on this soon!)– thanks to all of them for some truly awesome images! I could stare at the intricate details in these images for hours– go ahead, do it. Click to emostrichinate them (this post needs to be viewed on nice big screen), and oggle away…

Head and neck.

Head and neck.

Another view of the same.

Another view of the same. The highly flexible esophagus and trachea can be seen going diagonally across the neck; twisting from ventral to dorsal. It’s floppy, so it can do that.

Neck near the head; tapering.

Neck near the head; tapering.

Middle of neck. Check out the rings of the trachea!

Middle of neck. Check out the rings of the trachea!

Base of neck and shoulder

Base of neck and shoulder.

Shoulder and chest. Hard to image; thick and dense (still was frozen).

Shoulder and chest. Hard to image; thick and dense (still was frozen), hence the whiteout toward the left side of the image.

Check out that wing!!

Check out that wing!!

Ankle- note the big calloused pad that ostriches rest on (right side of image).

Ankle- note the big calloused pad that ostriches rest on (right side of image).

That two-toed foot... but did you know that normally the missing 2nd toe is still there as a fibrous remnant on the 3rd toe?

That two-toed foot… but did you know that normally the missing 2nd toe is still there as a fibrous remnant on the 3rd toe?

Tomorrow: the final day of Freezermas. What will it be?

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Sick feet, pig feet, boo hoo, in pain you are
Not well heeled; fate sealed, oh no, inflamed they are
And when your trotter’s on the floor
You’re nearly a good boar
Almost a porker

(corrupted from Pink Floyd’s “Pigs (Three Different Ones)” track #3 from the Animals concept album (1977). A song with quite a history- check out some more about it.)

It could happen...

It could happen…

Concept albums often weave back and forth between themes in a non-linear story, returning to refrains and leitmotifs to create their narrative weft and warp. This Freezermas, I’ve already woven in two legs and four legs, cats and other beasts, x-rays and more. Today, I tie in another thread, which extends throughout the blog, but especially into yesterday’s post. This post is about feet and health again. But it is also solely about pigs, which are cool animals whose biomechanics are surprisingly little studied.

It’s a shorter post (in contrast to the 11-17 minute Pink Floyd cousin song); a drum solo if you will; with just three images representing three big pigs and their funky feats of footedness, and the three days left in Freezermas. One image is about ongoing research; the other two about bizarre cases that kinda freak me out (enough to want to know more about them).

Stomach-Churning Rating: 4/10, not for gore but for surreality; things that should not be. Especially the 2nd picture.

pig gif

Above: X-ray GIF (may take a while to load) from our 3D XROMM analyses of foot biomechanics, here showing a pig studied by Dr. Olga Panagiotopoulou (also RVC Fellow Jeff Rankin; and Prof. Steve Gatesy at Brown University). With data like these, we not only can measure how the tiny bones move, but also get better estimates of the loads on the soft tissues within those feet. Those loads should relate to the risks of musculoskeletal injury or disease. This GIF is just a teaser for some fantastic 3D images we’re producing. The pig’s feet were normal. The odd little spheres on them are skin-adhered markers that let us compare how external estimates of skeletal motion compare to actual motion; normally this is a big source of error.

I know little about this case, posted on Reddit (link here), except that the overgrown, grossly deformed toes/hooves of this pig are like nothing I've seen before! This almost gave me nightmares. Poor chicken-footed pig!

I know little about this case (seems to trace back to an original Brazilian news story), posted on Reddit (link here), except that the overgrown, grossly deformed toes/hooves of this pig are like nothing I’ve seen before! This almost gave me nightmares. Poor chicken-footed pig. Foot deformities of this kind in pigs don’t seem to be as much of a problem as in cattle or horses; from the limited literature I’ve seen on this, they seem to have more problems with the soft tissues of their feet, such as  abscesses or inflammation of the digital cushion (padding) of the trotter.

Another crazy case; but this one I was able to track down more about after reading the Reddit post here. The Getty images page says: This photo dated November 24, 2011 shows a Chinese farmer showing off his prize swine, which he named 'Strong Pig', as the disabled animal keeps its 30kgs of body suspended in midair, in Mengcheng, east China's Anhui province. The pig has become an internet sensation around China due to its ability to walk around balancing on its two front legs. TOPSHOTS CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

Another crazy case; but this one I was able to track down more about after reading the Reddit post here. This news image page says:
“This photo dated November 24, 2011 shows a Chinese farmer showing off his prize swine, which he named ‘Strong Pig’, as the disabled animal keeps its 30kgs of body suspended in midair, in Mengcheng, east China’s Anhui province. The pig has become an internet sensation around China due to its ability to walk around balancing on its two front legs. TOPSHOTS CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)”

Bipedal pigs– two legs good again? I guess so. Well done, Strong Pig. Well done.

Bipedal ability in injured/deformed/spooked quadrupeds is not so unusual- in addition to trained macaques and rats that have been scientifically studied, there are plenty of examples out there on the internet of videos/GIFs of bipedal cats, dogs, and so on… Post your favourites below. Hooray for the marvelous plasticity of the locomotor system! As Pink Floyd famously wrote, “Any fool knows a dog needs a home, a shelter from bipedal pigs.” (or something like that)

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Why should you care
If you have to trim my hooves?
I’ve got to move with good feet
Or be put down fast.
I know I should trot
But my old vet she cares a lot.
And I’m still living on stone
Even though these feet won’t last.

(mutated from The Who, “Cut My Hair“, Quadrophenia… from the heyday of concept albums and grandiose rock!)

Talkin' bout my osteitis?

Talkin’ bout my osteitis

Day Four of Freezermas. Four posts to go. I can see through time… Hence the silly title for today’s concept album track. Quadrupedophilia did not have a good ring to it, anyway.

Stomach-Churning Rating: 4/10. Reasonably tame; bones and hooves. Some pathologies of those, but not gory.

If Quadrophenia was the story of a man with four personalities (metaphor for the four band members), then quadrupedopheniaphilia is the story of how diverse forms of four-legged animals have lots of problems because of our exploitation of them, which leaves a crisis to resolve: Who are we? Are we caring enough to fix a bad situation we’ve created for our four-legged ungulate comrades?

Four legs good, two legs bad? Not really. I featured ostriches earlier this week and two legs are indeed pretty good. Four-legged cats are great, too. But four-footed big beasties with deformed hooves: those are bad all around. That leads to today’s topic…

But hey, happy 205th funkin’ birthday Charles freakin’ Robert Darwin!

Charles Darwin on his horse “Tommy” in 1868- from the Darwin Correspondence Project, https://www.darwinproject.ac.uk/darwins-photographic-portraits

Today’s post concerns a phenomenon that (Western) civilization has wrought with large hoofed mammals, and evolution is a big part of it (as well as biomechanics and anatomy) . Cynical perspective, with some truth to it: We’ve evolved larger and heavier animals to either do harder and harder work on tough surfaces like concrete floors and tarmac roads, or to stand around while we gawk at them or wait for them to get fat and tasty. Either way, the outcome should come as no surprise: their feet, the interface of that hard ground and their body, eventually start falling apart.

I’ve posted about this several times with respect to rhinos and elephants (here and here and here and here and here), but this post hits closer to home: what goes wrong with the humble hoof of our friend the horse, cow, sheep or other ungulate. It’s where the rubberkeratin hits the road. Ungulates have not evolved to live on dirty, wet concrete floors; to be obese and inactive; or to have hooves that don’t get worn down. So they suffer when they do encounter those modern conditions.

“No foot no horse,” they say, and it’s so true- once the feet start to go (due to hoof overgrowth or cracks, abscesses or other trouble), it’s hard to reverse the pathologies that ensue (arthritis, osteomyelitis, infections, fractures, etc.) and the animals start going lame, then other limbs (supporting greater loads than the affected limb) start to go, too, sometimes.

Jerry the obese, untrimmed-hoof-bearing horse.

Jerry the obese, untrimmed-hoof-bearing horse. “Turkish slippers” is an apt description. DM has more here.

We can do plenty about these problems, and the title track above explains one of them: trimming hooves. Hooves often get overgrown, and if animals are tame enough (requires training!) or are sedated (risky!), hoof care experts (farriers) can rasp/file/saw them down to a more acceptable conformation. If we don’t, and the animals don’t do the trimming themselves by digging or walking around or living on varied surfaces, then the feet can suffer. But there’s still not much evidence for most common species kept in captivity by humans that indicates what the best methods are for avoiding or fixing foot problems.

What we’ve been trying to do at the RVC is use our expertise in evolution, anatomy and biomechanics to find new ways to prevent, detect, monitor or reverse these foot problems. We had BBSRC grant funding from 2009-2012 to do this, and the work continues, as it behooves us to do… Past posts have described some of this research, which spun off into other benefits like re-discovering/illuminating the false sixth toes of elephants. We’re working with several zoos in the UK to apply some of the lessons we’re learning to their animals and management practices.

Above: Thunderous hoof impacts with nasty vibrations, and large forces concentrated on small areas, seem to contribute to foot problems in hoofed mammals. From our recent work published in PLOS ONE.

Foot health check on a white rhino at a UK zoo. Photo by Ann & Steve Toon, http://www.toonphoto.com/

Foot health check on a white rhino at a UK zoo; one of the animals we’ve worked with. Photo by Ann & Steve Toon, http://www.toonphoto.com/

If it works, it’s the most satisfying outcome my research will have ever had, and it will prevent my freezers from filling up with foot-influenced mortality victims.

Again, I’ll tell this tale mainly in photos. First, by showing some cool variations evolved in the feet of hoofed mammals (artiodactyls and perissodactyls; mostly even/odd-toed ungulates of the cow/sheep and horse lineages, respectively). Second, by showing some pretty amazing and shocking images of how “normal” hooves go all wonky.

Two ways to evolve a splayed hoof for crossing soft ground: 2 toes that are flexible and linked to big pads (camel), and 2 main toes that allow some extra support from 2 side toes when needed (elk). At Univ. Mus. Zoology- Cambridge.

Two ways to evolve a splayed hoof for crossing soft ground: 2 toes that are flexible and linked to big pads (camel), and 2 main toes that allow some extra support from 2 side toes when needed (elk). At Univ. Mus. Zoology- Cambridge.

Diversity of camelid foot forms: big clunky, soft Old World camel feet and dainty, sharp highland New World camelids.

Diversity of camelid foot forms: big clunky, soft Old World camel feet and dainty, sharp highland New World camelids. [Image source uncertain]

Moschus, Siberian musk deer with remarkable splayed hooves/claws; aiding it in crossing snowy or swampy ground. At Univ. Mus. Zoology- Cambridge.

Moschus, Siberian musk deer with remarkable splayed hooves/claws; aiding it in crossing snowy or swampy ground. At Univ. Mus. Zoology- Cambridge.

Tragulus, or mouse-deer, with freaky long "splint bones" (evolutionarily reduced sole bones or metatarsals) and dainty hooved feet. At Univ. Mus. Zoology- Cambridge.

Tragulus, or mouse-deer, with freaky long “splint bones” (evolutionarily reduced sole bones or metatarsals) and dainty hooved feet. At Univ. Mus. Zoology- Cambridge.

Overgrown giraffe hooves. An all-too-common problem, and one we're tacking with gusto lately, thanks to PhD student Chris Basu's NERC-funded giraffe project!

Overgrown giraffe hooves. An all-too-common problem, and one we’re tacking with gusto lately, thanks to PhD student Chris Basu’s NERC-funded giraffe project!

Wayyyyyyyyy overgrown hooves of a ?sheep, from the RVC's pathology collection.

Wayyyyyyyyy overgrown hooves of a ?sheep, from the RVC’s pathology collection.

Craaaaaaazy overgrown ?cow hooves, from the RVC's pathology collection.

Craaaaaaazy overgrown ?sheep hooves, from the RVC’s pathology collection.

If we understand how foot form, function and pathology relate in diverse living hoofed mammals, we can start to piece together how extinct ones lived and evolved- like this giant rhinoceros! At IVPP museum in Beijing.

If we understand how foot form, function and pathology relate in diverse living hoofed mammals, we can start to piece together how extinct ones lived and evolved- like this giant rhinoceros! At IVPP museum in Beijing.

So, what do we do now? If we love our diverse hoofed quadrupeds, we need to exert that quadrupedopheniaphilia and take better care of them. Finding out how to do that is where science comes in. I’d call that a bargain. The best hooves ever had?

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Freezermas continues with track 3 of our rockin’ anatomy concept album! The number of the beast today is 5 (five days to go in Freezermas!), and I will deviate from the rock/metal theme to embrace the other side of the tracks: hip hop and rap. The Beastie Boys and I go way back: their “Licensed to Ill” album was the second cassette tape I bought (I remember proudly showing it off in Geometry class, circa 1986/7), and still ranks as one of my favourite albums ever. Everyone should own a copy of that, and of this next album…

The Five Felids, featuring KC

If only MCA were still alive to do this follow-up album…

The Beastie Boys’ superb, old school rap NYC-style (and themed) “To The Five Boroughs” (2004) satisfies my search for a #5-themed concept album/song. No track has that title, so I’m going with this one, “Triple Trouble” (song 3; day 3 of Freezermas… c’mon this is all just an excuse for me to talk about music I like and celebrate the concept album/freezers anyway!), as an introduction to a collaborative cat (felid) project we’ve started; and to continue the felid theme from Sunday (also be sure to check out the Snow Leopard dissection I posted on earlier!):

If You If You 
Wanna Know Wanna Know 
The real deal about the cats
Well let me tell you 
We’re felid funded ya’ll 
We’re gonna bring you some mad facts

(yes, that’s painful, I know… be relieved, I tried working some rap jargon into this post’s text but it just looked wack)

Dodgy-looking bagged-up skinned jaguar (bag-uar?) after delivery from Scotland.

Dodgy-looking bagged-up skinned jaguar (bag-uar?) after delivery from Scotland.

Anjali Goswami at University College London, myself, and Stephanie Pierce have teamed up to join the former’s skills in mammalian evolution, morphometrics, evo-devo and more together with our RVC team’s talents in biomechanics, evolution and modelling, and to apply them to resolving some key questions in felid evolution. We’ve hired a great postdoc from Bristol’s PhD programme, soon-to-be-Dr. Andrew Cuff, to do a lot of the experimental/modelling work, and then we have the marvellous Marcela Randau as a PhD student to tackle more of the morphometrics/evo-devo questions, which we’ll then tie together, as our Leverhulme Trust grant’s abstract explains:

“In studying the evolution of vertebrate locomotion, the focus for centuries has been on limb evolution. Despite significant evolutionary and developmental correlations among the limbs, vertebrae, and girdles, no biomechanical studies have examined the entire postcranial skeleton or explicitly considered the genetic and developmental processes that underly morphological variation, which are captured in phenotypic correlations. We propose to conduct experimental and geometric morphometric analyses of living and fossil cats, including the only large, crouching mammals, to study the evolution of locomotion, the mechanical consequences of size-related morphological evolution, and the evolution of correlations (modularity) in the postcranial musculoskeletal system.”

Above: snow leopard (headless) reconstructed and taken for a spin

Our study will integrate some prior studies from Anjali’s group, on modularity for example, and from my group, on the apparent lack of postural change with increasing size in felids (most other birds and mammals get more straight-legged as size increases, to aid in support, cats don’t– paper forthcoming). How does the neglected vertebral column fit into these limb-focused ideas? We’ll find out!

And it’s all very freezer-based research, using a growing stock of specimens that we’ve collected from zoo/park mortalities, many of which are kindly being supplied by Dr. Andrew Kitchener from the National Museums Scotland. We’ll be scanning, dissecting, measuring and modelling them and then returning the skeletons to be curated as museum specimens. This page features five sets of felid specimens involved in the research. We’ll be presenting plenty more about this research on this blog and elsewhere as it continues!

Above: ocelot from Freezermas day 1, now in 3D!

The Bag-o-Cats: whole specimens of a black-footed cat (Felis nigripes), juvenile cheetah, and juvenile snow leopard. I think. Sometimes you get a bag-o-cats and are not sure.

The Bag-o-Cats: x-ray CT slice showing whole specimens of a black-footed cat (Felis nigripes), juvenile cheetah, and juvenile snow leopard. I think. Sometimes you get a bag-o-cats and are not sure.

Panthera atrox (large American lion) from the NHM in LA. Oh yes we'll be applying our insights to strange extinct cats, too!

Panthera atrox (large American lion; “Naegele’s giant jaguar”) from the NHM in LA. Oh yes we’ll be applying our insights to strange extinct cats, too!

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Freezermas continues! Today we have a treat for you. Lots of detailed anatomy! This post comes from my team’s dissections of an ostrich last week (~3-7 February 2014), which I’ve been tweeting about as part of a larger project called the Open Ostrich.

However, before I go further, it’s as important as ever to note this:

Stomach-Churning Rating: 9/10: bloody pictures of a dissection of a large ostrich follow. Head to toes, it gets messy. Just be glad it wasn’t rotten; I was glad. Not Safe For Lunch!

If the introductory picture below gets the butterflies a-fluttering in your tummy, turn back now! It gets messier. There are tamer pics in my earlier Naked Ostriches post (still, a rating of 6/10 or so for stomach-churning-ness there).

All photo credits  (used with permission) on this post go to palaeoartist Bob Nicholls (please check out his website!), who got to attend and get hands-on experience in extant dinosaur anatomy with my team and Writtle College lecturer Nieky VanVeggel (more from Nieky soon)!

Research Fellow Jeff Rankin, myself and technician/MRes student Kyle Chadwick get to work.

Research Fellow Jeff Rankin, myself and technician/MRes student Kyle Chadwick get to work, removing a wing.

This is a male ostrich, 71.3 kg in body mass, that had gone lame in one foot last summer and, for welfare reasons, we had to put down for a local farmer, then we got the body to study. We took advantage of a bad situation; the animal was better off being humanely put down.

The number for today is 6; six posts left in Freezermas. But I had no idea I’d have a hard time finding a song involving 6, from a concept album. Yet 6 three times over is Slayer’s numerus operandi, and so… The concept album for today is Slayer’s  1986 thematic opus “Reign in Blood” (a pivotal album for speed/death metal). The most appropriate track here is the plodding, pounding, brooding, then savagely furious “Postmortem“, which leads (literally and figuratively, in thunderous fashion) to the madness of the title track, after Tom Araya barks the final verse:

“The waves of blood are rushing near, pounding at the walls of lies

Turning off my sanity, reaching back into my mind

Non-rising body from the grave showing new reality

What I am, what I want, I’m only after death”

I’m not going to try to reword those morbid lyrics into something humorous and fitting the ostrich theme of this post. I’ll stick with a serious tone for now. I like to take these opportunities to provoke thought about the duality of a situation like this. It’s grim stuff; dark and bloody and saturated with our own inner fears of mortality and our disgust at what normally is politely concealed behind the integumentary system’s viscoelastic walls of keratin and collagen.

But it’s also profoundly beautiful stuff– anatomy, even in a gory state like this, has a mesmerizing impact: how intricately the varied parts fit together with each other and with their roles in their environment, or even the richness of hues and multifarous patterns that pervade the dissected form, or the surprising variations within an individual that tell you stories about its life, health or growth. Every dissection is a new journey for an anatomist.

OK I’ve given you enough time to gird yourself; into the Open Ostrich we go! The remainder is a photo-blog exploration of ostrich gross anatomy, from our detailed postmortem.


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Hey, a short post here to say go check this new blog out! I love it. The first main post-introductory post is a dissection of a snow leopard, documenting a real vet case attempting to figure out why it died. The “Veterinary Forensics blog” is going cool places, and it is a kindred spirit to this blog. You might, as I do sometimes when walking into a veterinary pathology/postmortem facility, see surprising and rare stuff– like in this photo of urban foxes:

troop of foxes


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