The document is an introduction to human physiology presented by Dr. S. Karthik Nagarajan, highlighting the study of normal functions in living systems and the mechanisms behind these functions. It defines physiology as a branch of biology and an experimental science that explores how cells, organs, and systems work together, emphasizing the importance of maintaining homeostasis. The content establishes a foundation for modern medicine, addressing the transition from normal functions to disease conditions.

1. Introduction to
Human Physiology
Date: 29-03-2021
Presented by
Dr.S.KARTHIK NAGARAJAN
BSMS.,MD(S).,PGDYTVHS.,PGDEMS.,
Lecturer, Dept.of Physiology
Velumailu Siddha Medical College&
Hospital

3. What is Physiology
• It is the study of normal functions in a living
system
• Aim :
• To understand the mechanisms (Process)
behind the functions of a living system
• How the cells,organs,organ systems work
and how it is integrated at the organism level

4. Origin of Word : Physiology
• Greek word Physiology
Deals with living system
Natural Philosophy
Physiology
Physis Logos

5. Medical Physiology
• It is Foundation for Modern Medicine
• Human body deviate from normal function is it
called “Disease or Pathological condition”
Normal function
Abnormal
function(Disease)
Physiology Pathology
Medicine( Aim of Medicine Body brings back to
normal function

6. Cond..
• Physics – Study of material universe
• Biology- Study of life phenomena
• Physiology branch of biology which deals
with the “logic of life”
• Physiology word was coined by FRENCH
PHYSICIAN –JEAN FERNEL-Physialgia”

7. Experimental Science?
• Physiology is an experimental science
Claude Bernard-Father of
modern physiology
Maintenance of
stable internal
environment

9. Homeostasis