Where is the limit of human endurance?

When diving 18 degrees Celsius, the body loses heat through the skin 25 times faster in the air. The vascular surface shrinks to focus on the internal organs and maintain 37 degrees C for key parts. If necessary, sacrifice blood circulation in the limbs to focus on the body and the brain.

At the same time, the body releases noradrenaline, stimulates cell activity, to produce more heat.

When the body temperature reached 35 degrees Celsius , the body was "trembling" and the muscles began to shrink more and more violently to create maximum heat. The problem is that this heat is produced in the extremities that will be dispersed immediately by the surrounding environment. Moreover, this effort quickly dissipates the body's last source of energy.

From 32 degrees C, start delirium : After the trembling period, the body no longer has cold-resistant solution. The temperature dropped very fast. All cells work slowly. One of the first attacked organs is the brain. People no longer think, speak and make rational decisions.

Under 30 degrees C, coma: The pulse of the heart and breath is getting slower and slower. At 20 degrees Celsius, the heart definitely stopped beating. Without immediate action, people will die. If resuscitated and warmed properly, it can be saved. For example, a Norwegian girl, 29, survived after her body cooled down to 13.7 degrees Celsius for an hour.

How long to be thirsty

Normally, we take 3-7 liters of water every day. When drinking water is no longer available, the body has only one solution to limit the dehydration: play a little "discharge" of the kidney. This is a body purification station. Normally it filters blood, removes toxins, excess salt and puts it all in urine. It needs to consume 1-2 liters of water for this task. While in need, it can limit itself, using only about 0.5 liters to release toxins.

After 100 hours of not drinking water, death is close: because water, which accounts for 70% of body weight, is vital, especially because it maintains blood in a liquid state. During this stage, blood loss is 20%, so the blood is denser, more difficult to move, creating a risk of blockage. It is also very difficult to transport oxygen and nutrients to cells, causing them to die slowly. More dangerous is toxic substances accumulated in the blood. Indeed, in order to maintain minimal blood volume, the amount passes through the kidneys to filter no more. So toxins accumulate in the blood. Especially potassium with a high concentration in the blood will stop the heart.

How long can be fasted

On average, a person with normal structure can fast until 70 days to die, if there is enough drinking water. That's because the body has stockpiles of food in the form of sugar and fat, which can be "fought" if it is hungry for a long time. They are stored in the liver, muscle and fat cells. When eating stops, the body mobilizes all measures to maintain blood sugar ratio. That is the main source of energy, especially for the brain.

First, the body waggles sugar in the liver, which is mobilized easily, allowing it to maintain for about 4 hours. Then, it encourages storage of sugar in muscles, then liver fat and fat cells. Switching to sugar, the body can last for several weeks.

When the fat is exhausted, the body nibbles on the protein of the cell. At first are muscle cells, then organs. The goal is to maintain the most important parts. When a large part of the body's protein is removed, the heart is no longer active, the body dies.