Water is the source of life. The human need for water is second only to oxygen. If a person does not ingest a certain vitamin or mineral, he or she may be able to continue to live for a few weeks or live with illness for a number of years, but if a person does not have water, he or she can only live a few days. An important component of human cells is water, which accounts for 60-70% of an adult’s body weight and more than 80% of a child’s body weight. What is the role of water? 1, a variety of human physiological activities need water, such as water can dissolve a variety of nutrients, fats and proteins to become suspended in water in a colloidal state in order to be absorbed; water in the blood vessels, cells flowing between the oxygen and nutrients transported to the tissue cells, and then metabolic waste out of the body, in short, a variety of human metabolic and physiological activities are inseparable from water; 2, water has a certain role in the regulation of body temperature. When people breathe and sweat will excrete some water. For example, in the hot season, the ambient temperature is often higher than the body temperature, people rely on sweating, so that water evaporates to take away part of the heat, to reduce body temperature, so that people from heat stroke. And in the cold, due to the potential of water storage heat, the body does not cause significant fluctuations in body temperature due to the low outside temperature; 3, water is also the body’s lubricant. It can moisten the skin. The skin is dehydrated, it will become dry and lose elasticity, appearing pale. Some of the body’s joint capsule fluid, plasma membrane fluid can make between the organs from friction damage, and can turn flexible. Tears, saliva are also lubricants for the corresponding organs; 4, water is the world’s cheapest and most curative power of the wonder drug. The health and disease prevention effects of mineral water and electrolyte water are well known. Mainly because the water contains components beneficial to the human body. When the cold, fever, drink more boiled water can help sweat, reduce fever, flush the toxins produced by bacteria in the blood; at the same time, the increase in urine is conducive to accelerating the discharge of toxins; 5, large burns and the occurrence of violent vomiting and diarrhea and other symptoms, the body lost a lot of water, are in need of timely replenishment of fluids to prevent serious dehydration, aggravating the condition; 6, a glass of water before bed helps beauty, before going to bed, you In any case, a glass of water, the beauty benefits of this glass of water is very large. When you fall asleep, that glass of water can penetrate into every cell. The cells absorb the water, the skin is more delicate and tender; 7, a glass of water before going to the bath often keep the skin youthful vitality, before bathing must first drink a glass of water. The amount of sweat in the shower is twice the usual, the body’s metabolism accelerated, drink water, so that every cell in the body can absorb water, creating a light and soft skin; 8 It should be noted that for the elderly and children, tap water boiled to drink is the most beneficial to health, the water purifier sold on the market, purification will reduce the minerals in the water, long-term drinking effect is not as good as natural water sources. Insufficient water intake or excessive water loss can cause water loss in the body, also known as dehydration. According to the ratio of water and electrolyte loss, there are three types. 1.hyperosmolar dehydration: mainly water loss and relatively little electrolyte loss; 2.hypotonic dehydration: mainly electrolyte loss and less water loss; 3.isotonic dehydration: water and electrolyte loss in proportion to the body fluid osmolarity, which is more common in clinical practice. Life on earth first appeared in water. Water is an important component of all living things. Water in the human body accounts for 70% of body weight; water is essential to maintain life, people have quality requirements for drinking water, if the water lacks essential elements or certain harmful substances, or contaminated water quality, can not meet the drinking requirements, it will affect human health. There are a lot of aquatic vegetation and other aquatic organisms living in the water. Water is conducive to the chemical reactions in the body, and also plays a role in transporting substances in the organism. Water plays a great role in maintaining the stability of the temperature of the organism.