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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. It helps us understand what happens in a healthy body in everyday life and what goes wrong when someone gets sick.
Physiology is a branch of science that deals with the general concepts and biophysical and biochemical principles that are basic to the function of all the systems. Medicine is an ever-changing science. As new research and clinical experience broaden our knowledge, changes in treatment and drug therapy are required. In Human Physiology, we attempt to explain the specific characteristics and mechanisms of the human body that make it a living being. The very fact that we remain alive is almost beyond our control, for, hunger makes us seek food and fear makes us seek refuge. Sensations of cold make us look for warmth. Other forces cause us to seek fellowship and to reproduce. Thus, the human being is actually an automaton, and the fact that we are sensing, feeling, and knowledgeable beings is part of this automatic sequence of life; these special attributes allow us to exist under widely varying conditions which physiologists term as HOMOSTASIS .
We feel that the teacher of physiology in a medical school owes it to his or her students, to emphasize those aspects of the subject which will throw light upon functions and disorders and train them well in approach towards the diagnosis and treatment of disease. The physiologist, can, in this way play a part in giving the student and physician a vantage point from which he may gain a rational view of pathological processes”.