what role does water play in the human body?

Answer 1

water plays an important role in our body. as water is essential for life as 2/3 of the body is made up of liquid. all the tissues in the body are bathed in a watery liquid.

water is also needed for the blood circulation system. when water is lost through our breath, perspiration and urine, it has to be replaced.

without water, the body becomes dehydrated, a condition which could lead to death. health experts have recommended that we drink at least 8 glasses of water a day.

-functions of water
water is required by the body for many functions, the most important of which stems from the fact that it is a good solvent, that is, many substances dissolve in it. this enable it to act as an excellent transport medium; for instance:
~ to transport nutrients to all the cells in the body:
~ to transport hormones to where they are needed;
~ to transport waste products away from the cells to the excretory organs; and
~ to act as a medium for chemical reactions, since chemicals are more reactive as aqueous solutions than solids.

in addition, water has the following functions in the body:
~ to assist in maintaining body temperature by cooling the body- excess body heat is removed by the evaporation of water from skin and lungs;
~ to act as a cushion and protect the internal organs from shocks and injury;
~ to help in lubricating joints; and
~ to form the main component of digestive juices.

besides drinking water, we also can obtain water from the drinks, soups and in fruit and vegetables that we take.

remember:
without water, we could become dehydrated and the variouus systems in the body will not be able to function property. in servere cases the ultimate results could be death due to dehydration.

Answer 2

The human body is 67% water and it is important because all of the minerals and chemicals can be carried by water. Water, due to it's angled structure of two hydrogen and one oxygen allows many of the important chemicals that are necessary for daily life to be aborbed and tranported, but the water rarely reacts with anything. Not only can the chemicals be dissolved in water, but the body can also pull chemicals out of the water, thus making it the great and wonderful transport.

Answer 3

Water serves as a medium within which the chemical reactions of the body take place. It is more than a passive solvent within which inorganic elements, gases, and organic compounds are dissolved or suspended. Water is involved in hydrolytic processes; transport of hormones, nutrients, and metabolites; lubrication of joints; transmission of light in the eyes and sound in the ears; and excretion of waste. Water also gives form to the body and provides protective cushioning for the nervous system (Askew, 1996).

Water’s role in thermoregulation is particularly vital. Water absorbs heat at the point of generation with little temperature rise and dissipates it throughout the fluid compartments of the body. Thus, damage to enzymes and structural proteins is minimized, and heat-bearing blood plasma can be routed to the skin, where heat is transferred to the environment through conduction, radiation, convection, and evaporation. Panting also dissipates heat, and body heat is transferred to the environment via the moisture carried out by each exhalation. The vaporization of one liter of water at 20°C constitutes the loss of 585 kcal of heat (Kleiber, 1975; Askew, 1996).

Percentage of body water differs among humans according to sex, age, and reproductive stage (Askew, 1996). Because women tend to have less muscle and more adipose tissue than men and adipose tissue has about 10% water compared with about 76% water in muscle, men usually have a higher percentage of body water (about 60%) than women (about 50-55%). A human infant has about 77% body water, whereas an elderly person can have as little as 45%. Pregnancy usually increases blood volume and alters relative water distribution between intracellular and extracellular compartments (Southgate, 1987).

Answer 4

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The cells of your body are made mainly of water, so if you don't get an intake of water it affects your cell structure and ultimately makes you dehydrated and ill. Water is also used to flush poisons and toxins out your body, your kidneys, liver etc pass toxins into the water which is then passed out your body.

Answer 5

Lean muscle tissue contains about 75% water. Blood contains 83% water, body fat contains 25% water and bone has 22% water.

Answer 6

Cells use H2O to

1) store hydrogen for the structure of more cells
2) Use oxygen for energy to do work, and to store for future use in synthesis and amino acid synthesis.

It is impossible to live without the cells in our bodies to use water.

Answer 7

water is one of our major constituient of the body. 75% of our body is water.
it also acts as a medium for various things like chemical reactions and transporations.
the five basic elements are earth, air, water, fire and sky.
all these are necessary for life to exist.

Answer 8

You are mostly water if you weren't they could bury you in small match box.

Answer 9

u've got to be kidding.