Physiology is a sub-discipline of biology that studies how organisms, organ systems, organs, cells, and bio-molecules carry out the chemical or physical functions that exist in a living system.
Physiology is divided into, among others, animal physiology (including that of human), plant physiology, cellular physiology, microbial physiology, bacterial physiology, and viral physiology.

vCalc's Physiology folder contains equations related to the scientific study of function in living systems.