The role of water for the human body
The adult human body consists of 70% water, children have water content in body tissues is up to 85%. Along with the water produced by the body, the toxins are removed and disposed of the decay products resulting from metabolism processes. Circulates the body, it ensures the supply of all internal organs with vitamins and microelements. So, within days after the brain is fifteen hundred gallons of water through the kidneys is about two liters.
But the liquid is not only constantly circulates in the body and its internal organs, it also constantly removed from it through sweat, urine and feces. Per day output of about 2.5 liters of fluid, which also contains some trace elements. Therefore, the supply of water, necessary for life support, must be constantly replenished. In the normal state to replenish water a person needs about 2-2,5 liters of water, but the needs of the body can increase if you are doing physical labor and sweating profusely or sweating stimulates hot weather.
One of the participants in the "Irish hunger strike" in 1981, lived for 77 days without food, eating daily only a small amount of water.
How much time a person lives without water
The lack of water in the body causes dehydration, which increases the density of blood and if the water does not flow, the blood eventually becomes so viscous that simply stops flowing through the veins and blood vessels, followed by imminent death. In normal circumstances, a person can live without water for 3-5 days, but if he is physically strong and trained, he will live a week. In medicine known cases where people have lived without a drop of liquid 10 days, but during this time his body has already occurred irreversible pathological changes.
Caravans in the desert, without water, placed in the mouth a small oval pebble and sucked it in my mouth not dry. It is possible to delay the symptoms of dehydration and get to the source.
But if the person would be without water in the hot desert, his death could occur within days – because of sweating and hence cooling of the body stops, he will die from heat stroke. Signs of dehydration are: dry mouth, rare urination, dark urine with a pungent smell of ammonia. In extreme stage, there is a feeling at the mote in the eyes begins to dry out the mucous membrane, and quickens the heartbeat. People may fall into a coma and lethargy, and he develops vomiting and diarrhea, and then comes shock and death.
Advice 2: How long can a person live without sleep
There is a strong belief that people cannot live without air, water, food and sleep. Every year more and more is experiments whether in reality can not exist without these conditions. It is proved that on average, no air can reach about one and a half minutes, without water about 5 days without food - no more than two months. And without sleep, each person can do different times.
Why the need for sleep
The human body is designed in such a way that he needs constant change cycles of wakefulness and sleep. In the dream is almost a third of your life. Sleep is necessary to restore vitality and energy consumed. Insomnia is painful for any living organism. In ancient China, there was a penalty of insomnia. The body of the man was driven to complete exhaustion, not letting him rest.
Sleep is a key indicator of mental health. Man, having the ability to sleep 7-8 hours a day, is a full member of society. People nedosypayuschie or sleeping more hours, as a rule, feel sluggish and unfocused. Just imagine, one sleepless night reduces efficiency by 30% two in a row already at 60%. Five sleepless nights can significantly undermine mental health.
Scientific experiments or "sleeping volunteers"
In 1965 the school student Randy Gardner set a record, no sleep for 11 days. The first day the teenager felt quite natural. After a couple of days he started having headaches. Also began to show the first signs of Alzheimer's disease, that is memory loss. Towards the end of the experiment, the student started the hand tremor and strong hallucinations. He could not concentrate and perform even the simplest tasks. The experiment was terminated.
Later, according to unconfirmed sources, a certain man had a deadline with no sleep in 28 days.
The world record for time without sleep, no one belongs to Robert McDonald, who was able to do without rest and without special stimulants for 18 days and 21 hours. However, scientists determined that this case is rather an exception to the General rule, since the average period without sleep and special harm to health is only 3-5 days.
Life without sleep
Of course, it is impossible. In a few days starts the irreversible change of the General hormonal background. After 5-7 days the cells of the brain, not withstanding the loads start to break, which can lead to irreversible consequences.
Scientists say that when strong overloads the body is capable of so-called "surface sleep", that is, people like not sleeping and doing his job, but the part of the brain thus giving yourself an opportunity to rest.
Of course, experiments with insomnia are extremely dangerous, and you should not tempt your body with samples to set a record. For a full life and good health be sure to give yourself rest and normal sleep.
Advice 3: How many days can you live without food
A lot of people experience a very unpleasant feeling when they skip at least one meal. However, there are those who are able to go without food for a long time, without feeling special discomfort. However, after a long fast is difficult to come in normal physical condition, it will take some time.
How long can you live without food?
How long you can go without eating depends on various factors. According to doctors, a normal healthy person can do not eat for about 2 months, approximately 60 days. However, it should be drinking water, otherwise 5-7 days, death can occur from dehydration. How many people can live without food depends mainly on its body weight, health, willpower, endurance, and climatic conditions.
Of course, people in excellent physical shape is able to go without food for a long time, but his body must be adequate supply of fat. The human body processes food and then leaves reserve fats, proteins and carbohydrates. If necessary, it splits them into energy. When a person uses up their reserves, his body no longer receives the nutrients and energy. Because of this, he begins to slowly die.
What happens to the human body when fasting?
During fasting the human body is a lot of new processes. The body goes to the domestic security and first uses to maintain its vital fat stores, and then switches to muscle. During this period, significantly reduced the metabolism and the body's response slowed down significantly. When human exposure during fasting, cold weather, stress or viral infections can also cause the increase calorie consumption.
So that for a long time without food, a person needs to have large fat reserves, be in good physical condition to economize energy. After you exit the starvation may encounter some discomfort when eating. We should not immediately overload your stomach, it is best to start with small portions and then gradually increase their volume. After some time the body will get used and will once again normally respond to incoming food.
Who can live without food longer?
The average person can live without food for about 20-25 days, if we are talking about a man weighing 70 kg. Oddly enough, the fairer sex and the elderly can go without food for a little longer. According to statistics, without food the first die boys 15-17 years, and then Mature men, older people, and the last dying woman.
As a rule, death by starvation occurs when the loss of the initial weight is 30 to 40%. However, as they say, every rule has its exceptions.
For example, a case included in the "Guinness Book of world records" when a woman in Africa can survive without food for as much as 102 days. Some people can survive without food for 50 days, while others are killed on day 15.
Advice 4: How long can you live without water?
Every day a person needs about two to three liters of water. On average, without water we can live only three days. If it does not move and stay at a moderate temperature, it is possible to extend this period for another few days. Life expectancy without water is dependent on the health status, environmental conditions and willpower.
The importance of water for human
A large part of the human body consists of water. Water is one of the most important substances necessary for life. Our muscles, organs, tissues and even bones are composed of water and require constant replenishment. The adult human body consists of water seventy percent, and the newborn child is almost ninety percent liquid.
Water moves in the body minerals and trace elements, eliminates toxins from the body, recycles the decay products, regulates body temperature. For the proper functioning of all organs and systems needed in day to consume about 40 milliliters of water per kilogram of weight. Also during the day, the organism appears about the same number. The lack of water in the body can lead to dehydration, a person dies in a few days.
How long can you live without water?
If without food a person can live a long time, water scarcity is strongly felt after a few hours, and leads to death in just a few days. The timing may be different depending on several factors. Scientists estimate that on average only 3 day to healthy people have died without water. But there are many cases when people are held 5 days a week and even 10 days. If, after such stress on the body of the man survives, his health would be irreparably damaged.
The record for survival without water is owned by the Japanese, who survived twenty-four days without food and liquid. Most of this time he spent unconscious.
First time of a lifetime without liquid dependent on ambient temperature and human activity: if you stay in the shade and sitting still with the air temperature from 16 to 23 degrees, you can survive up to 10 days. When the temperature increases 3 degrees, the lifetime is reduced without water for a day. In deserts, where the air is heated to 40 degrees during the day, a person can die in just two days.
Also the life expectancy in such conditions depends on the state of health, metabolic rate and physique of the person. Fat reserves help extend the life time.
The most common way of survival in conditions of water scarcity: take a small round pebble and put in his mouth. Thus stimulated the salivary glands that moisten the mouth that distracts from thirst and gives time and effort to find water. Also, the stone contains minerals that will support the body.
Advice 5: How long can a human sleep
The people of approximately the third part of the life spend in sleep. It is as necessary to life as breathing, water and food. Being long deprived of sleep, the person begins to experience health problems.
In 1964 a young man, Randy Gardner of San Diego participated in the experiment and did not sleep for 11 days, the result of which was listed in the Guinness book of records. In the first two days he felt fatigue and irritability, and on the sixth day he began to show signs that foreshadow Alzheimer's disease, then hallucinations and paranoia, trembling hands, confused speech, forgetfulness.
Later this record was broken by 42-year-old Briton Tony Wright who stayed awake 11 days, but for a few hours longer than Randy Gardner. At this time he ate only fruits and vegetables, drinking herbal tea, played pool and kept a diary. In the Guinness book Tony never got because the deprivation category (deprivation) sleep was excluded from the book because of its destructiveness to one's health.
Known cases and a much longer period of wakefulness, but they are mostly people with certain unique features. Ordinary, the average person is able to go without sleep for 3-5 days at the cost of very great efforts.
Here have value, and individual human characteristics. Someone to rest and restore requires up to 12 hours a day, and someone needs 4 hours of sleep (enough, for example, Napoleon, and several historical figures). Someone can be in the active state longer and some less. It is believed that a need for sleep affects the strength and power of human energy, its bio-field, which can fix some appliances.
The consequences of lack of sleep
Sometimes people do not sleep for several days, working on an urgent project, being in an extreme situation or war.
In any case, without the need better not to test the capabilities of your body and provide restful sleep. After regular and prolonged lack of sleep the body is difficult to recover. The consequences - dizziness, slow response, and confusing the speech, digestion, decline in visual acuity, problems with the nervous system, depression, accelerated aging, decreased mental and physical abilities, etc.
Scientists found that one sleepless night reduces cognitive function by 30% for two nights - 60%. Then begins to change hormones, communication between neurons in the cerebral cortex, suffers psyche. The longer the Wake, the more problems arise. Through three-five days without sleep begin to break down the brain cells, increasing the load on the heart and on the entire body. Further sleep deprivation leads to irreversible complications and even death.
Advice 6: How many people will live without food and water
The lack of food and water today seems impossible. It is nice to realize that a healthy person quite a long time can do without food.
Without food to survive is quite simple
On the duration of starvation affects many factors. Main of them — the willpower, the desire to test yourself or cleanse the body - working only in the case of a voluntary hunger strike. Many schools of alternative medicine recommend to arrange a long hunger strike to improve the condition of the body. But quite often peoplewho survived the disaster are forced to go without food for quite a long time. In this case, willpower primary.
Doctors believe that a healthy person whose body is not suffering from malnutrition and serious diseases, can fast up to eight weeks. Although there are precedents when people go without food (but not water) for a longer term, but it should be noted that many died of hunger and exhaustion until the expiration of the term.
What affects the duration of the hunger strike?
Strong people with adequate amount of adipose tissue can go without food longer than skinny. Because the body is trying to save energy in a variety of types. This fat, proteins and carbohydrates. During fasting, the human body uses carbohydrates first, then comes the turn of fatty tissue, and then and proteins. Therefore, theoretically, people can fast longer than the others.
For the duration of the starvation impact metabolism. If a person has a slow metabolism, without food it can hold more. Generally, when the body does not have enough food, the metabolism slows significantly, to waste less energy. To return it to normal speed quite difficult, even after returning to a normal diet.
The most important external factors — climate. Extreme heat or severe frosts are equally reduce the time a person can survive without food. In hot weather, the body quickly dehydrated, and in the cold — spends too a lot of calories to maintain its normal temperature. In a temperate climate without food "stretch" for a long time a lot easier.
Without water there is no life
The bad news is that the lack of water is far more destructive. Without it, the average person will spend three days, sometimes this period may be extended to five days. There have been cases when the human body fought with dehydration ten days, but health irreparably deteriorated. Because the survival of heart, kidney, brain, and blood viscosity directly depend on the amount you drink.
The absence of water, literally means for the body dying. For the normal functioning of the blood-vascular system is very important to the fluidity of the blood. Dehydration primarily reduces the fluidity of the blood, which in the end can not properly provide oxygen to the body organs. So without water, people will live much less than without food.