And some darned completely different ones too. There are some darned close to identical components in rats and pigs as well. Guess we evolved from them as well?
Actually, we're pretty closely related to both. Which explains why both are useful in medical research. Kind of strange, isn't it? I mean, here we are, the unique, unusual, and singular pinnacle of creation, and yet we can look at rats and pigs to understand human pathologies. You'd almost think we had a common ancestor.