Why does evaporation keep our body cool?
How does the body keep its temperature?
Humans are warm blooded animals. Your internal body temperature is 37 degrees Celsius. The human body has to keep this core temperature in balance. It may only deviate minimally. But how does the body keep its temperature?
Every human body has two temperature zones: In addition to the Core temperature, which mainly includes the head and the most important organs, there is also the so-called Shell temperature. This can and may increase or decrease as necessary. It includes the parts of the human body that are on the outside, i.e. arms and legs and all parts around the internal organs. The body absorbs and releases heat through this outer shell. And he can also use it to regulate the core temperature.
He does it like this:
If the ambient temperature is very cold, for example, the body shell gives off a lot of heat to the outside. And this she also withdraws from the core of the body. So that the temperature does not drop too much there, less blood is transported into the body shell. The hands and feet then cool and the body begins to shake. This tremor is a protective mechanism. The muscles move rhythmically to warm up the body. Because muscle movements generate a lot of heat. That's why it's good to move around a lot when it's cold.
But a lot of movement can also generate too much heat. The body shell is then very warm and can give off a great deal of its heat to the outside. But if that is not enough to keep the core temperature from rising, the body begins to sweat. This is also a protective mechanism. When sweat evaporates, a lot of heat is removed from the body. The body shell cools down more quickly and can also remove excess heat from the core of the body.
Another way to cool the body down is to change the ambient temperature. If it is too hot in a room, for example, you open the window. It also works the other way around. If it is too cold, dress warmly or stay in warmer rooms.
By the way:
Humans have to maintain their core temperature so that vital metabolic processes can take place continuously in the body. If the body temperature were to rise above 42 degrees or fall below 32 degrees, it would be life-threatening! Ah!
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