When Kat and I were learning about the heart and cardiovascular system, we really wanted to get an in depth understanding about the human heart and how it works. We had built a model of a pump to mimic a heart, we had made up a circulation game with little blood cell pieces, and we had even made an anatomically correct model of the human heart! What we hadn't done, was look at a real heart, in the flesh, and see how we we learned looked in reality.
For this, we turned to the tried and true method of biological dissection! A biological dissection is a very detailed examination of a deceased (and sometimes preserved) plant or animal. It often involves cutting it open at specific points to get a good look at the inner workings of the organism. Kat is no stranger to doing dissections, as she did her first when she was four years old. She had found a giant crab spider that had perished in our office and wanted to take a look at it. She actually made a fascinating discovery, that spiders have almost metallic looking springs loaded in their pedipalps (pads on their front two legs) that they use in mating!
|Kat's crab spider dissection, featured in|
The Not So Creepy Crawlies