It almost seems like an insult that the animals we commonly associate with human traits of ugliness, laziness and greed are in fact the best models for studying our own anatomy. Yet it's true that humans and pigs are very closely related mammals and pigs have all the same thoracic and abdominal organs as humans making them an excellent subject for studying our own major organs and organ systems.
Our own 'resident scientist'- a slightly contrived title for my school's attempt to integrate more science into school life- Dr Rutherford has brought an excitingly infectious passion to the biology side of school life and as a part of his attempt to bring more life to science set up a pig's head dissection for the school's budding biologists to get stuck in with- a rare and thrilling opportunity.
Before the day of the dissection I considered how it's every aspiring medic's fear that they will have an undiscovered fear of blood and gore that will make the life they've toiled and slaved for as a doctor an existence they find a cataclysmic black hole of terror. But I was delighted to find that my fear of having such a fear was utterly ridiculous. Sawing through a fleshy pigs skin and fat to the bone of its skull is far from a repulsive experience. In fact it's exhilarating in the sense that you're about to unravel the secrets that lie behind those folds of skin. What's unveiled is a wondrous anatomy just below the surface that rules every action we take and yet's strangely it's beauty is never appreciated. Studying structures in a-level biology is certainly a reason to be impressed by the complexity of the systems that rule us but you can't truly appreciate this complexity and beauty without seeing it literally 'in the flesh'. It's also really nice to appreciate the interest that this dissection draws- for all the right reasons. Students didn't turn up on that Friday lunch to see how 'gross' this could be but because they had that curiosity to discover it seems so many scientists share.
Google some statistics briefly and it's easy enough to discover that according to a group of Cambridge scientists a pigs skull is around 30mm thick which compared to the comparatively thinner skulls of humans with mens' skulls 6.5mm and womens' 7.1mm, (I wonder why the traditionally more at risk from head injury men had thinner skulls..?- another time) is astoundingly thick. Adapted so for the constant trauma to the head a pig will experience from fighting and defence using head-butting. It certainly took some effort to saw through the skull as what began as a diligent and structured approach quickly disintegrated into an assault from the top of the pigs head inward with students hammering away and sawing through this impossibly thick bone. Once the top of the skull was finally popped off (splattering a bit of pigs brain on a certain someone in the process..) the brain was revealed in all its glory. A little injured by the brutal attempt to reach it, the brain was surprisingly small and the folds were far larger than that of what you'll have seen of human brain diagrams. Even so it was quite exciting to have before us perhaps the most complex system in the universe. A vast network of neurones and synapses that controls our function.
Moving on we managed to remove the snout revealing the fleshy and boneless interior of the pigs nose as well as then moving on to dissect both eyeballs. The eyeball dissection was certainly the most diligent part of the whole procedure as we had to peel back the iris and ciliary body to reach the lens- a satisfyingly clear and cylindrical structure that controls the focal point of our vision.
The entire process was certainly a thrilling way to bring to life the brief overview of anatomy we have covered in a-level biology and it gives me an expectant excitement for all the anatomy learning and dissection I have yet to come in medical school; it certainly brings me one step closer to finding the idea of dissecting a cadaver less strange.
No comments:
Post a Comment