Full Definition of VARIATION. 1. a: the act or process of varying: the state or fact of being varied b: an instance of varying c: the extent to which or the range in which a thing varies. 2.: declination 6. a change in the form, position, condition, or amount of something. : something that is similar to something else but different in some way. music: a repeated version of a short piece of music with changes in its rhythm, tune, or harmony.
Types of human physiology. Human physiology is the study of functions of the human body that can be divided into the following types:. Cell physiology. This is the cornerstone of human physiology; it is the study of the functions of cells. Special physiology. This is the study of the functions of special organs.
Human physiology is closely related to anatomy, in that anatomy is the study of form, physiology is the study of function, and there is an intrinsic link between form and function. The study of human physiology integrates knowledge across many levels, including biochemistry, cell physiology, organ systems, and the body as a whole. Contemporary research in human physiology explores new ways to maintain or improve the quality of life, development of new medical therapies and interventions, and charting the unanswered questions about how the human body works.