What role of water in human life?
Water - life juice. So Leonardo Vinci said yes. Really, water is an indispensable component of all live. Plants contain about 90% of water, in a body of the adult of its 65%. Even bones contain 22% of water. In her muscles already 70%, in a brain and fatty tissues - 75%. In blood - even 92%. The main part of water, about 70%, is concentrated in cages, and 30% are an extracellular water which is divided into two parts: the smaller part, about 7%, is blood and a lymph, and the most part - the interfabric, washing cages.
And water not just there contains, and plays an important role in activity of an organism. A certain and continuous maintenance of water - here a necessary condition of existence of a live organism. At change of amount of the consumed water and its salt structure processes of digestion and assimilation of food, blood formation are broken. Without water regulation of heat exchange of an organism with environment and maintenance of body temperature is impossible. Water brings waste products and harmful substances out of an organism.
That is the main physiological functions of water - a filler, solvent, a temperature regulator, the carrier (a transport and information role).
As a filler - water keeps not only external shape of separate bodies and appearance of the person in general, but also provides their normal functioning. Therefore the person has to support the necessary amount of water in an organism. The person very quickly feels violation of water balance. If the amount of water in a human body decreases by 1 - 2% (0,5 - 1 l) against norm, the person thirsts; at reduction by 5 - 8% (2 - 3 l) his skin is wrinkled, in a mouth dries up, the consciousness is darkened, hallucinations can develop; loss of 10% of moisture (~ 5 l) causes frustration of the mental device, violation of a glotatelny reflex; at loss of 14 - 15% (7 - 8 l) of people dies.
As universal solvent - water dissolves nutrients for their penetration into a cage, participates in chemical processes at digestion, and also washes away waste products and leaves an organism through kidneys and skin, carrying away with itself harmful substances. Besides, water is that physics - the chemical environment thanks to which the majority of the reactions of a metabolism providing continuous process of destruction and restoration of living tissues can be carried out. Thus, water is the main biological liquid. She not only the inert environment, it can enter connection with other components of live matter also.
Water plays also temperature-controlled a role - maintains necessary body temperature.
It carries out it the big thermal capacity in case of decrease in temperature and evaporation from a body surface at its overheat.
Transport function of water is carried out thanks to its high superficial tension. Thanks to this property it can get into the thinnest capillaries and intercellular spaces, bearing organism cages food and bringing out of them waste products. About water, as the carrier of information - later.
Quality of performance of all these vital functions depends on various properties of water what several subsequent articles will be devoted to.]