Human body - a hydraulic plant

To make sure a person died or not, the ancients put a mirror in front of their nose. If you see that the vapor does not settle on the mirror, you know that the person has passed away. Steam escapes from the lungs, which is the last witness of living activity.

The human body is like a sponge, in men, water accounts for 64% of body weight, and in women is 70%. Water nourishes and cleanses the human body. Even our thinking depends on water: without water there is no energy, so it does not create the functioning of the nervous system.

The method of using mirrors to determine the above mentioned death fits well with the truth: Of all the elements that make up us, water plays the most important role. It is important first because of the volume. On average, a person weighs 70 kg, the body contains about 45 kg of water (almost 2/3 of body weight). In the brain, water accounts for 85%, 70% in the skin; heart: nearly 80%. Even in bones - the symbol of firmness in the body also has a water percentage of up to 20%. In the place where snakes are most, teeth also have water, accounting for 0.2%.

Water crept through various 'pipes', present in the vascular system, spreading throughout the body. The system consists of 160 million small arteries, 500 million venules and 5 billion capillaries, a total of 940 km of tubes that carry blood throughout the body.

But water is not only present in the process, they cross blood vessels, especially porous capillaries (occupying an area of ​​about 300 m2 all over the body) and travel in the winding paths between the cells. cell. Finally, they penetrate the cell membrane to enter the cell.

These streams hold vital functions in the human body. First of all, through the blood vessels or lymphatic networks, water sends energy to internal organs so they can function. In other words, water transports food (fat, sugar) to muscles. As such, water is like a "charterer" and a talented charterer. Because while transporting, water also processes the materials they take away. Water participates in the transformation of food, turning them into energy available for human use. Next, the water removes waste through urine, sweat and breathing. Finally, water also functions to operate the human body's protective factors: lymphocytes (leukocytes).

In addition, the country has great thermal potential. It takes a lot of new energy to make the water change the temperature. However, water in the human body always maintains a constant temperature. This dual property helps us avoid excessive changes in body temperature. Throughout the body, water prevents chemical reactions that are too strong and abruptly causes cell damage.

An auxiliary element for this air conditioning system is sweating. When people sweat, water will evaporate, absorbing energy on the surface of the skin. Without this phenomenon, the body will be affected by an excessive heat, very harmful.

Water has another very important function, few people remember, it is to create a structure for the body. The body is made up of an enormous amount of cells, each with a covering membrane. Water affects the shape of all these parts. Without water, the cells will be deformed, twisted, the structure will be shaken.

Water is also essential for the activity of enzymes. Without water, enzymes lose their shape and therefore cannot function properly. Consequently, the cell will die.

But the greatest ability of the country is to bring life to human thinking; it is the source of thought. Water helps the nervous system, especially the brain, to function. Thanks to the presence of water, many atoms divide into ions that carry electricity, helping to transmit nerve impulses.

Water is a vital element of the human body so it needs to be preserved in almost constant quantity. This is guaranteed first in the kidneys, it emits more or less liquid depending on the body's needs. If the body lacks water, the blood becomes thicker, the kidneys are alerted so the amount of urine will decrease. If dehydration becomes more severe, on-site collaboration will start: the kidney sends to the liver the emergency signal. Mediated with another message, the emergency signal will reach the adrenal gland, which orders the kidney to recover the salt and thus collect the whole country.

If after sweating a lot, the level of water deficit is worse, this time, the brain will intervene. Alarmed, the pituitary gland releases hormones that cause vasoconstriction. This substance stimulates the kidney to further limit urine discharge. The intestine, especially the large intestine, will cooperate in the 'anti-drought' process mentioned above. This agency draws water in the stool, more or less depending on the order of the pituitary gland. To supplement, the body burns some sugar to release water.

Often, when the water is not deficient for more than 3 or 4 days, the body will experience serious disorders. After 15 days without water, the cell will no longer work and the danger will come.