The maintenance of a constant environment in the body is called Homeostasis. Prime objective of this lecture is to present on Homeostasis. Body cells work best if they have the correct Temperature, Water levels and Glucose concentration. The tendency of the body to seek and maintain a condition of balance or equilibrium within its internal environment, even when faced with external changes. A simple example of homeostasis is the body’s ability to maintain an internal temperature around 98.6 degrees Fahrenheit, whatever the temperature outside.