The word physiology derives from the Latin “physiologĭa” and the Greek “φυσιολογία” means “phisio” of “nature” and “logia” is said to be of “study” or “treaty”, physiology is about the science that studies organic beings in which they unite the beginning of precise knowledge, where they give meaning to those interactions of the basic components of a living being with its distribution and explaining the reason for each different situation, in which these components can be discovered. But it is also based on the knowledge of ideas that are not linked to living beings such as thermodynamic, electricity, gravitational, meteorological laws, among others.

Thermodynamics is the branch of physics that explains the equilibrium states at the microscopic level that constitutes a phenomenological theory, based on deductive reasoning, which studies real systems, without modernizing and following an experimental method. Electricity is the one that manifests itself through physical phenomena and properties. Gravitational is linked to the energy of attraction that occurs between bodies endowed with mass. Meteorology is the science of several scientific disciplines of the atmosphere, which studies the state of the weather, the atmospheric environment, the phenomena produced there and the laws that govern it.

In order for physiology to develop, ideas are needed both at the level of molecules and the organism in which the living being is capable of exchanging matter and force with the environment in order to reproduce. The hypothesis in physiology is that it fulfills an objective, in order to be accessible to those developments and functions of the living being and all its components at all levels.

The functions of the type of living organisms can be differentiated into three that are, plant, animal, and human physiology.

Plant physiology is the one that is in charge of the functions of the organs and tissues that are developed specifically for plants.

Animal physiology studies the biological functions of the various animal species that can be performed at the organ level.

Human physiology is the knowledge that studies the performance of multicellular beings, which is one of the oldest knowledge in the world.