Water Balance

Fluid can enter the body as preformed water, ingested food and drink, and to a lesser extent, as metabolic water.

Fluid can leave the body in several ways: urination, exretion (feces), and perspiration (sweating).

Urea, a nitrogenous waste material, is the end product excreted in urine when ammonia is metabolized by animals, such as mammals.

Dehydration is the excessive loss of body fluid.