The French physiologist
The French physiologist, Claude Bernard was the first to define the term milieu intérieur, which is now known as homeostasis in the year 1865. He explained it by referring to the extra-cellular fluid environment, and its physiological capacity to ensure protective stability for the tissues and organs of multicellular living organisms. (Gross, 1998).
Bateman et.al (2004), has defined Homeostasis as the process by which the functions and chemistry of a cell or internal organ are kept stable, even when external conditions vary greatly.
Homeostasis is considered an important physiological condition to maintain the normal and healthy role of all the body organs. In this process the involved organs detects deviation that occurs in any of the body conditions and aim to correct it.