Water from the most important elements for human life at all and it is two-third of body weight and without it life goes on so long,and that man can live long weeks without food and can not live for a few days without water, loss of body water leads to death faster than hunger.And water in the human body there are two forms,one outside the tissue and represents the largest part,and the other within the tissue,and the water outside the tissue is a fluid found in blood and lymph and means of spinal cord and the secretion of other ,such as gastric secretion,bile,pancreas,etc.The water withen the tissue represents the fluid surrounding cells in the courses interfaces and liquids constituents of protoplasm withen the cells themselves.The functions of water in the body:1-The water functions of many important and vital to maintaining the continuity of life,summarized as follows.2-The water is the medium in which it dissolves and moves by which all elements of food from a member to another ,where that function.3-Facilitates digestion and absorption and excretion.4-Maintain the level of osmosis inside and outside the cells at the boundary of the natural process of balance within the body(balance-mail).5-Play an important role in maintaning the evudence of body temerature when only natural in hot climates,when the person feels a high degree of heat to a fever,for example,the process of sweating occurs,which moisturizes the skin and the balance of temperature and lead to a fall.6-Carry water ,or toxic substances harmful to the body resulting from the metabolism by the kidneys to get rid of them on the body such as urine urea and uric acid and others.7-The water confer the role of food easier to chew the presence in the saliva and thus ingested and digested.8-By the water into the gastrointestinal tract and facilitate the process of directing the body to get rid of waste.Water is an important element in the process of building cells and helps to speed healing of tissue when infected wounds or diseases.Requirement of the body of water.The body needs approximately 2-3 liters of water per day in moderate weather.
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