While searching for side by side references, like the bones of a cat compared to the bones of a human and such, I found this spectacular blog about anthropocentric anatomy . The blog's about a subject that for a while I have been trying to look for, and that's concerning the structure differences of bipeds and quadrupeds. the posts in this blog cover the differences and similarities in the spines, pelvis heads and necks, both in quadrupeds and bipeds. The explanations are in great detail and most importantly the posts have top notch artistic illustrations.

If you wish to improve in visualizing body structures, or just want to learn something new and interesting, I implore you to give this blog a look!

http://anthroanatomica.blogspot.com/search?updated-max=2013-05-10T07:41:00-07:00&max-results=7&reverse-paginate=true