Human physiology means❓

Physiology is the study of how the human body works. It describes the chemistry and physics behind basic body functions, from how molecules behave in cells to how systems of organs work together. Human physiology is the science of the mechanical, physical, and biochemical function of humans, and serves as the foundation of modern medicine. As a discipline, it connects science, medicine, and health, and creates a framework for understanding how the human body adapts to stresses, physical activity, and disease.

Human physiology is the science of how the human body functions in health and disease.  

It examines human physiological systems from the molecular and cellular levels to the human body as a whole. This area of study uses basic science to measure human responses to internal and external stimuli (such as changes in activity levels, varying environmental conditions, and disease processes), and applies this knowledge to the promotion of human health.