Sleep and its effect on the human body.

Probably each of us, at least once thought about the question, what is a dream and why is it so important for the body?

These questions torment people since ancient times. At first, the dream seemed to people a mystery, they thought that it was sent to us by the gods. But soon with the development of natural sciences, fantastic ideas about sleep began to yield to scientific ones.

Studying the phenomena occurring in the body during sleep, scientists have proved that sleep has a beneficial effect on the body and does not freeze as originally thought, but as it were recharged with new energy. Therefore, after a deep and healthy sleep, a person feels a surge of strength and vivacity.

Especially important is the dream for restoring the functions of the nervous system and the brain. During sleep, all processes in the body slow down. All organs and tissues rest and restore their functions.

The biological significance of sleep lies in the restoration of the working capacity of the body, tired during the waking period.

Back in the middle of the last century, many scientists thought that sleep was the result of "bleeding the brain," but the theory of the so-called "sleep poisons", which was created by the French scientists R.Lejandre and A.Pyoron, was more widely spread. They believed that sleep occurs because the blood accumulates toxic products of metabolism - hypnotoxins.

These substances suppress the activity of the nervous system. Similarly, the theory of "sleep poisons" had convincing evidence. An animal that was deprived of sleep for several days, took blood serum and injected into the blood of another, a well-sucked animal. This animal immediately fell into a deep sleep. However, observations of sleep in natural conditions will also disprove this theory.

-So why do you still need a healthy dream, you ask?

And he needs it for the fact that a deep healthy sleep is necessary for the body as well as breathing, digestion or blood circulation. After a sound sleep, a person feels rested and capable of any work, both mental and physical.

- What, then, is the absence of sleep harming your health?

Lack of sleep is very unhealthy. The person quickly gets tired, there are gnawed pains and the body becomes more susceptible to various types of diseases. A prolonged absence of sleep causes severe disorders in the body, and sometimes even leads to death. Especially harmful to nedosypat children: it slows down their growth, weakens immunetet and predisposes to diseases. Doctors have determined the duration of sleep for people of different ages.

A child aged 1 year needs 16 hours of sleep; 3-year-old -14; 5-year-old -13; 7-year-old-12; Children 10-12 years old enough 10-hour sleep; In 17 years and older, 8 hours a day. Thus, it follows that an adult man sleeps about a third of his life.

Does the state of sleep depend on the environment?

Yes it depends, quiet is very important for sleep. The less noise in the room where sleep, the more peaceful and useful the person's sleep will be. And also for normal sleep clean air is necessary. Very useful in the summer to sleep outdoors, and the rest of the time, with an open window.

And in conclusion, let's add a small survey of people.

- Do you think sleep is important for the human body?

"Of course it's important, this is one of the main needs on a par with food.

- I think that sleep is most of the time a person spends.

- I think that many will agree with me that sleep is one of the main features of the human body, hence sleep is important for the human body.

- What is the function of sleep?

- Sleep performs a restorative function

(The body rests), sortirvrchnuyu (all the information for the day is eliminated and displayed on the shelves), well, just interest in terms of dreams, otherwise we would be bored to sleep.

- Most likely, sleep performs the restoration function of the nervous system.

- can anything in your opinion replace a dream?

- It can be modified, as did Da Vinci: he counted the phases of sleep in such a way that every 4 hours he slept for 15 minutes and was alert almost a day. Sleep can not be replaced, as can not replace the food. Yes, you can make concentrates, sublimates, but they will still be food. With sleep the same way.

- I think that no matter how people try to replace the dream, it will not be possible to completely do it.

- You can not completely replace the dream, but you can prolong the state of wakefulness.

From a small survey of people it follows that sleep for a person plays a big role in life and has not been completely replaced by anyone!