3.2.2.3 Water GapFill

Water is built from one particle of oxygen and two particles of  humourhydrogenretinolhelium. In room temperature it is  liquiddensesalivasolvent and it is an important  steamsystemsolutesolvent for many substances.

All living organisms need water to stay alive and perform the basic life processes. For example, water is needed to  prevent hypothermiafree sugarsdevelop obesitycool the body when it's hot – it is then excreted in the form of  sebumsweatspongesolvent and evaporated from the skin surface. Water also  aids perceptionsupports collagenaids digestionimprove the immune system as it dissolves many substances, helps to swallow and supports absorption of nutrients in the intestines. Another function of water is to  detoxifydeluderemove wasteintoxify as it transports waste products from around the body to the  feetsweat glandsbrainkidneys – here they are excreted together with  salivaurinemycoproteinepidermis.

Water is lost from the body through kidneys and intestines, skin and the  musclesrespiratory systemcardiovascular systemsensory receptors. The most water is lost during  blood acidityphysical activityhydrationshopping, on hot sunny days and during diseases with high  feverantibiotic useurineoutput. It is important to drink enough water as otherwise  dehydrationhigh smokehydrationhyperventilation may occur. The main symptoms include dark urine, dry skin, overheating and  heat strokeheat defecthigh smokehypothermia.

Water can be provided to the body with beverages, milk, juices, vegetables and many other food products. A healthy person should drink  three to four litresone to two pintssix to eight glassessix to eight pints of water each day.