In comparative anatomy we study the anatomy and physiology of the human body, and we often compare our anatomy to the anatomy of other living...

In comparative anatomy we study the anatomy and physiology of the human body, and we often compare our anatomy to the anatomy of other living things…cats, sheep, pigs, etc. But how can such a comparison be made?(a) What criteria we use to classify organisms as belonging to one “species” compared to another.(b) What characteristics do all ”vertebrates” share?