For example, water is an important matter after oxygen. In the adult body weight is water, 60%. Children in the proportion of water more, nearly 80% of. If a man does not eat his body, depending on the nutrient storage or consumption of autologous tissue, can live the last month. But if you do not drink water, even for a week is also very difficult. Body water loss 10% threat to health, such as loss of 20%, have life danger, foot visible water on the significance of life.