Oinklopedia - Pigology Pigology Pigs are mammals.
Humans are mammals.
All of the major biological structures found in humans are also found in the pig. Yes, there are some obvious differences. For instance, a pig's adrenal glands are found near the aorta, instead of on top of the kidneys like ours are. But for the most part, we're biologically quite similar. Below are some interesting facts about pig biology.