physiology

This term focuses on the dynamic mechanisms of life, specifically how organs and systems work together to maintain homeostasis. It is distinct from anatomy, which describes the static structure and layout of the body. While anatomy is the map, physiology is the operation manual. In a broader sense, the word is often used in medical and athletic contexts to describe an individual's biological predisposition or a species' specific functional adaptations. It carries a clinical, scientific tone and is rarely used in casual conversation unless referring to a field of study.