Internal environment
TERM FOR EXTRA-CELLULAR INTERSTITIAL FLUID SURROUNDING BODILY ORGANS
Milieu interieur; Interior milieu; Milieu intérieur
The internal environment (or milieu intérieur in French) was a concept developed by Claude Bernard, a French physiologist in the 19th century, to describe the interstitial fluid and its physiological capacity to ensure protective stability for the tissues and organs of multicellular organisms.