What is the difference human animal bone?
For example, pelvises of cats are much narrower than the humans.
why? because humans have to walk, with two legs. but cats don't.
they have their weight balaced into four parts.so, their pelvis'
don't have to be wide. but, humans, walk with two legs, which will
divide their weight to only two parts, their pelvis, has to be
wide, to balace out the weight. for another eg. frog's thighs are
much longer and thicker. why? also, frog has to jump and leap to
other places. which will advance their thighs to be long and