All cells and organs need water to function. The body can maintain for weeks without food, but cannot survive without water for more than a few days. -Water makes up between 50-60% of body weight, is the basis of saliva, serves as a lubricant for fluids surrounding the joints, regulated body temperature through perspiration, and helps prevent and alleviate constipation by moving food through the intestinal tract. – The larger and more active a person is, the more water he requires.
