The field of animal physiology extends the tools and methods of general physiology to non-human animal species.
Its scope of subjects is at least as diverse as the tree of life itself.
Due to this diversity of subjects, research in animal physiology tends to concentrate on understanding how physiological traits changed throughout the evolutionary history of animals.
Animal physiology can also be classified according to its reltionships to other scientific disciplines:
Ecophysiology[?] tries to undertand how physiological traits affect the ecology of a given animal and vice-versa.
