It is not for nothing that they say that water is the source of life. Finally, it represents about two-thirds of the body's weight. It enables the functioning of our organism and performs a function similar to that performed by the sea on Earth. It relieves the fatigue that occurs during metabolism, maintains body temperature, transmits information throughout the body, increases the body's defense capabilities, prevents friction between tissues and maintains the moisture of the mucous membrane. Now that you know what it all does, check out 6 things that happen to our body if we don't drink enough of it.