水是生命之源,是维持人体生理与新陈代谢活动的重要物质,人体组织的1/4是由水构成的。人可以一整天不吃饭,但不能滴水不沾。 健康的人每天需饮水2～3kg。口渴表示人体细胞已经失去了一定程度的水份,大脑中枢已发出要求补充水份的信号。当人体失水量达体重的20％时,就会发生机体代谢紊乱,造成血液循环量减少、脉搏和呼吸过速、消化器官功能降低、食欲减退 Water is the source of life, is an important material to maintain human physiological and metabolic activity, human tissue is composed of 1/4 of water. People can not eat all day, but can not drip non-stick. Healthy people need to drink 2 ~ 3kg daily. Thirst means that the body’s cells have lost a certain amount of water, and the brain has sent a signal asking for water. When the body’s loss of water up to 20% of body weight, there will be metabolic disorders, resulting in reduced blood circulation, pulse and respiration, reduced digestive organ function, loss of appetite