2213. For it is well known that the insides of the animate body are entirely different from the outside. From the outside, no one could deduce that the interiors are as they are unless this had been revealed to the person by ocular vision. Then it is obvious that they are entirely dissimilar, consisting as they do of brains, spinal marrows, lungs, heart, or little hearts, a stomach, a liver, vessels devoted to generation, among other things found in a large animate body. Moreover, they consist of countless tissues, vessels, tunics, ligaments, so as to function unanimously. Thus they make up a body that is nothing but the complex of all those parts appearing in a simple form to the eye, which is unaware that there are such and so many components-indeed, such that if one were lacking, a crippling effect would rebound into the composite whole as a serious defect.