We love to watch films about space, but it is not always true to draw knowledge about life from them. So, in the films it is shown that a person, being in space without a spacesuit, can explode or freeze.
Will the man explode?
No, a person will not explode, no matter how brightly it is shown in science fiction films. That's why they are fantastic - the laws of the genre oblige, but in reality this will not happen to a person. It must be admitted that there is still logic in this myth, since it is quite logical to assume that, due to the large difference in pressure, a person will “inflate” and may burst like a balloon.
In fact, a person will simply exhale all the air, since with a pressure drop in the suit of 1 atmosphere, the load will be 40 kilograms on the soft sky, the area of which can be conventionally considered 4 square centimeters. A person, with all desire, will not be able to hold back the air. And it certainly won't explode. Human tissue is not an elastic balloon and is not as fragile as brushwood.
Will the person freeze?
Contrary to ideas, a person who finds himself in space without a spacesuit will not turn into ice and will not instantly freeze, since space is a vacuum, not cold and not hot, heat is transmitted there only by radiation, and it is negligible for a person. The person will feel cool, and water will evaporate from the surface of the body. Instant freezing is definitely not a threat to a person - in the absence of an atmosphere, heat will be removed from the body very slowly
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Will the liquids boil?
The blood of a person who is in space without a spacesuit will definitely not boil, since if the external pressure drops to zero at a blood pressure of 120/80, the boiling point of blood will be 46 degrees, which is higher than body temperature. Blood, in contrast to the same saliva, is in a closed system, veins and vessels allow it to be in a liquid state even at low pressure.
Water, unlike blood, will quickly evaporate from all surfaces of the body, including the eyes. Also, the boiling of water in soft tissues will approximately double the volume of some organs and damage the organs. It is also believed that a person, once in a vacuum, may feel the signs of decompression sickness, but this is unlikely, since the pressure difference will be only one atmosphere.
Will the man catch fire?
On fire - will not light up, but it can burn. There is no UV protection in space. All exposed areas of the body exposed to direct sunlight will develop ultraviolet burns.
Will the man suffocate?
Yes, the person will suffocate. After about 30 seconds, he will lose consciousness, since, as we know, he will have to exhale the air, the person will experience a state of deep hypoxia. Loss of orientation and vision will occur.
However, if within one and a half minutes a person is nevertheless placed in an oxygen chamber, then, most likely, he will come to himself.
There have been several precedents in the history of astronautics when a person experienced depressurization in space. On August 19, 1960, astronaut Joseph Kittinger jumped from a height of 31,300 meters. The tightness of Kittinger's right glove was broken, causing the hand to be severely swollen and sore.
In 1965, an American astronaut was in a vacuum chamber, he lost consciousness after 14 seconds. He remembered that during this time saliva boiled on his tongue.