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.
The study of the functioning of living organisms, especially the human organism. Physiology includes BIOCHEMISTRY but this is such a large discipline that it is followed as a separate speciality. Together with ANATOMY and PATHOLOGY, physiology is the basis of medical science.