It’s the science that studies the functions that regulate the living organisms. That means that it studies the biochemical reactions, the interactions and properties of the cells and organs that form the organism. It’s a very general term.
Physiology is the study of structure and function in living organisms – it has a very old history dating back to ancient Greek times when ancient philosophers wanted to know what certain things like different organs in the body did and how they did it. Now we look at all different levels from molecules, to cells, to organs and whole organisms to work out how they are put together and how they work.
Physiology is about how certain parts of the body might function, so for instance how the heart might work or the kidney. These are structures that perform specific functions.
All living things contain structures that have certain functions, so plants, insect and fish all have a particular physiology.
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