What branch of biology deals with the chemical and physical processes inside living organisms?

Physiology is the branch of biology that focuses on the chemical and physical processes that occur within living organisms. It encompasses the study of how organisms function at various levels, including cellular, tissue, organ, and system levels. Physiology examines key functions such as metabolism, respiration, circulation, and reproduction, providing insight into how living beings maintain their biological systems and respond to environmental changes.

Other branches of biology, such as ecology, botany, and zoology, have different focuses. Ecology studies the relationships between organisms and their environments, botany concentrates on plant life, and zoology focuses on animals. While all these fields are essential for understanding life, they do not specifically target the internal processes of living organisms in the way physiology does.