he had taken of the kidneys in his book, Parts of Animals he says that the kidneys, “are present in some animals, but not of necessity; they are present to serve a good purpose” (267). The kidneys, in his eyes, serve two purposes “(1) to subserve the blood-vessels; and (2) to excrete the fluid residue” (271). The first purpose is more “to provide an anchor for the lower blood vessels,” where the second, pertains to their specific function, “to purify blood” (33). The kidneys “dividing membrane”…
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