Why can't people's body temperature change with the change of temperature?

According to the research of physiologists, around 30℃ is the best environmental temperature for human body, and it is also the temperature closest to human skin.

33℃- sweat glands start to start.

After working at this temperature for 2 to 3 hours, the "air-conditioned" sweat glands of the human body will start to emit accumulated body temperature through slight sweating.

35℃- Heat dissipation mechanism starts immediately.

At this time, the superficial vein dilates, the skin sweats, the heart beats faster, and the blood circulation accelerates. For some elderly and infirm people with poor heat dissipation, it is necessary to cooperate with local cooling or turn on indoor air conditioning to reduce human body temperature.

36℃- 1 alarm

At this temperature, the human body "cools itself" by evaporating sweat to release heat, and excretes minerals such as sweat, sodium and vitamins every day, and the blood volume also decreases. At this time, drinks containing salt, vitamins and minerals should be supplemented in time to prevent electrolyte disorder in the body, and other cooling measures should also be started.

38℃- secondary alarm

Once the temperature rises to 38℃, it is difficult for human sweat glands to sweat to ensure normal body temperature. Not only do the lungs have to "gasp" to exhale heat, but even the heart has to speed up and output 60% more blood to the body surface to participate in heat dissipation than usual. At this time, cooling measures, cardiac drug health care and treatment can not be relaxed at all.

39℃- level 3 alarm

Sweat glands work hard, and there is a danger of sudden death of heart disease at this time.

40℃- level 4 alarm

High temperature makes people dizzy. At this time, people must immediately go to a cool place or use ice cubes to cool down. People who feel unwell need to be sent to hospital immediately for treatment.

41℃-be very careful.

Sweating, breathing and blood circulation of the human body ... all organs that can participate in cooling are close to the end of their tether after full horsepower. For frail patients and the elderly, this is a "shock temperature", so we must be especially careful.