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水是自然界的一切生物生命过程中所必须的物质之一。水是生命之源,人为了维持其正常生理活动,需要有充足的水供应。水是构成人体的主要物质,是构成体液最基本的部分。正常人含水量依年龄性别而不同,新生儿及幼儿含水量最多,可占体重的70%以上;成年人含水量一般占体重55%—60%左右,其中男性较女性略多;60岁以上男性含水量为体重51.5%,女性为45.5%左右。
Water is one of the necessary things in all biological life processes in nature. Water is the source of life, in order to maintain their normal physiological activities, need adequate water supply. Water is the main material that makes up the human body and constitutes the most basic part of body fluid. Normal water content varies according to age and sex, most of newborns and young children, can account for more than 70% of body weight; adult water content generally accounts for about 55% -60% of body weight, male slightly more than women; over 60 years of age Male water content of 51.5% body weight, women 45.5%.