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FALSE:::::::: Up to 60 percent of the human body is water, the brain is composed of 70 percent water, and the lungs are nearly 90 percent water. About 83 percent of our blood is water, which helps digest our food, transport waste, and control body temperature. Each day humans must replace 2.4 litres of water, some through drinking and the rest taken by the body from the foods eaten.
Water plays a crucial role in overall body health, but tales of near-universal dehydration seem to be exaggerated. Water, water everywhere: Water is by far the largest constituent of the human body, making up about 60 percent of your total body weight. This large pool of water performs many crucial functions.