Water sources and physiological function

Added Date:2007-03-18　　Come From :Internet

1st, how does the Earth water is produce?
The water is the hydrogen and the oxygen most universal compound,��ѧʽ (H2O). Probably in 5 billion years ago, separates the nebula�ſ� - chondrite from the solar nebula, at the same time circles thesun to revolve, at the same time the rotation, gradually forms theprimitive Earth. At first the water exists by the crystal water formin the meteorolite. The earth interior strenuous exercise creates theearthquake and the volcanic eruption, the crystal water turns themoisture, comes out with the rock magma steam eruption, drifts in theatmosphere. Gradually cools along with the earth's crust, theatmospheric temperature also slowly reduces, the moisture take thedust as ��, turns the waterdrop, jumps over the product to bemore, forms the violent storm, descends the ground, forms the riversalong the Job's tears, along the way permeates underground, flowsforms the primitive ocean to the Earth most depression. Under thesolar energy function, the Earth water body unceasingly evaporates,repeatedly forms the sleet, falls the ground, in the land and theseabed rock salinity dissolution, unceasingly collects in the seawater, passes through several hundred million years circulationaccumulation, turned the salty water. Part of high places water turnthe glacier, part of permeating underground turns the ground water.The Earth sails upstream the ultimate reserves approximately nearly1.4 billion cubic kilometers, more than 97.9% are the salty water,distributes in the sea, does not have 2.1% is only the fresh water.Accounts for ultimate reserves 1.43% to assume the solid water tosolidify in the terrestrial pole ice cap, the mountain glacier and thepermafrost bottom ice, occupies 0.6% ground water to bury in theearth's crust, the rivers and streams lake water and the aerospherewater and so on only account for the global water ultimate reserves0.055%. Participates in the global water cycle and may renew year byyear, the maintenance dynamical equilibrium fresh water reservesapproximately composes the global water ultimate reserves 0.5%, butthe direct use pale water volume only accounts for the global waterultimate reserves about 0.3%.
Because the Earth population unceasingly increases, the waterpollution is more and more serious, the water function graduallydegenerates, the average per person fresh water possessive amountreduces year by year, the 21st century humanities world biggest crisisis the water resources question.

2nd, what position does the water occupy in the human body?
Looked from the nutriology that, maintains the human body life themain nutrient to have the moisture content, the protein, the fat, thecarbohydrate, the vitamin, the mineral substance, the cellulose andthe nucleic acid and so on. The moisture content accounts for thehuman body body weight above 65%, the brain organization probablycontains moisture content 85%, the blood contains water reaches ashigh as 90%. Therefore, the water is maintains the human body life theextremely important nutrient.

3rd, what is the water main physiological function?
(1) the water is constitutes in vivo all cells the principalconstituent;
(2) the water is in vivo all metabolism responses media;
(3) the water is transports the nutrient and the excretion wastemedium;
(4) the water may adjust the body temperature and the lubrication;
(5) the water may provide some mineral substance and the traceelement.

4th, how much water does the person drink to be appropriate every day?
The human body probably daily kidney urinates 1,500 milliliters (ml),the skin evaporates 500ml, the lung breath drains water 350ml, theexcrement discharges 150ml, equals the human body to drain water everyday approximately 2500ml. Must maintain the life, achieves ˮƽ��,the normal person must take in moisture content 2500ml every day. Onfirst in the three meals a day mix meals supplemented moisture contentapproximately 1000ml, in vivo nutrients oxidation produces metabolismapproximately 300ml, other 1200ml, must supplement through the dailypotable water. Therefore, person daily potable water 1200ml quite isappropriate.

5th, why does the potable water have fixed time the quota?
The potable water with eats meal equally must speak the science, bestdrinks 3-4 time every day, each time 300-400ml, fixed time quota. Donot wait till thirstily anxious, the somatic cell dehydration, thecerebrum main center sent out the signal, felt thirsty when only thenfiercely drank, was not thirsty when did not drink, that wasunscientific. The quota potable water, is fixed time advantageous tomaintains in vivo regularly ˮƽ��, maintains the organismphysiology function and the metabolism.

6th, when is the potable water the best time?
After (1) the morning gets out of bed the potable water, supplements anight of between the water consumption;
(2) about 10 AM the potable water, may supplement the perspiration andthe urine discharge moisture content;
(3) about 3 PM the potable water, supplemented once again in vivodischarges moisture content, also causes the waste which in vivostores up smoothly to discharge, prevents the human body acidity.
Front (4) about 8 PM, rest the potable water, are the potable waterbest time, when sleep front the blood density advances, rests thepotable water to be allowed to dilute the blood, the accelerationblood circulation.

7th, what is the healthy water standard?
(1) in the water does not contain any to the human body virulent, isharmful and has the unusual smell the matter;
(2) in the water includes the mineral substance and the trace elementwhich the human body must is moderate;
(3) water degree of hardness is moderate;
(4) in the water contains the oxygen to be rich;
(5) the hydrone group is small;
(6) the water sour alkalinity assumes the weak basicity;
(7) the water physiological function is strong.