Physiological polymorphism is an important concept of physiological anthropology. Firstly, in the present paper, the terms related to physiological polymorphism are extracted from related dictionaries. We tentatively defined physiological polymorphism as follows: the state in which individuals of the same species of organism exhibit physiological variations. From the viewpoint of population biology, it is thought that the population of humans is an assembly of normal small groups. Additionally, we think that it is important for the traits of a small group to be explained by physiological mechanisms. Furthermore, we described a tentative idea about an approach to the elucidation of physiological polymorphism.
