Introduction of Anatomy and Physiology

Anatomy is the science of the structure of animal bodies, either living or dead.
Physiology is the science of the function, purpose, or action of living animal tissue. Both sciences usually study either humans alone or humans in relation to other animals.

Aristotle, the world's first meticulous biologist, conducted his own experiments and advocated that others likewise do so. Nevertheless, in a very un-Aristotelian way, his results and those of his school were enshrined in the centuries after his death while his rigorous empirical method was mostly ignored.