Homeostasis[1]

Homeostasis is the property of either an open system or a closed system,[2] especially a living organism, which regulates its internal environment so as to maintain a stable, constant condition. Multiple dynamic equilibrium adjustments, regulation mechanisms, make homeostasis possible. The term was coined in 1932 by Walter Bradford Cannon from the Greek homoios (same, like, resembling) and stasis (to stand, posture).

[1] From Wikipedia at http://en.wikipedia.org/wiki/Homeostasis retreaved 10 Oct 07

[2] Farabee.Michael J.Ph.D. (2006)"Animal Organ Systems and Homeostasis" Estrell Mountain Community Collegehttp://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookANIMORGSYS.html