Define the following physiology.

Physiology is the branch of biology that deals with the normal functions of living organisms and their parts, including the physical and chemical processes involved in bodily functions such as metabolism, growth, and reproduction. It is the study of how living organisms function and how their various systems work together to maintain homeostasis.

Physiology is the scientific study of the functions and mechanisms of living organisms and their constituent systems, organs, cells, and biomolecules. It is a branch of biology that seeks to understand how living systems work and how they maintain homeostasis and respond to environmental changes. Physiology encompasses a wide range of topics, including:

- Cardiovascular physiology: The study of the heart and blood vessels, including blood flow, blood pressure, and heart function.
- Endocrinology: The study of hormones and their role in regulating various body functions, such as metabolism, growth, and reproduction.
- Gastrointestinal physiology: The study of the digestive system, including the functions of the stomach, intestines, and other organs involved in digestion.
- Immune system physiology: The study of the immune system and its role in protecting the body from infection and disease.
- Muscular physiology: The study of muscles, including their structure, function, and control.
- Neurophysiology: The study of the nervous system, including the brain, spinal cord, and nerves.
- Pulmonary physiology: The study of the respiratory system, including the lungs, airways, and gas exchange.
- Renal physiology: The study of the kidneys and their role in regulating fluid and electrolyte balance.
- Reproductive physiology: The study of the reproductive systems, including the ovaries, testes, and other reproductive organs.
- Sensory physiology: The study of the sensory systems, including the eyes, ears, skin, and nose.