Body temperature and weather temperature

The normal body temperature is between 36 and 37℃ (it will be higher than 37℃). If the temperature is lower than the normal body temperature, the metabolism of the human body will slow down, and if it is low enough, it will lead to shock and endanger life. When a person's body temperature exceeds 37℃, it will be judged as low fever or high fever, which will also lead to some problems in the human body and endanger life. However, it should be noted that normal body temperature, somatosensory temperature and body temperature are different.

What is normal body temperature? The last article mentioned the concept of "normal body temperature". The normal body temperature of the human body is "between 36 and 37℃". Although some people's body temperature will exceed 37℃, this is an individual phenomenon, and their body temperature will change with the changes of human body and external environment.

There are many factors that affect the change of body temperature, such as gender, age, exercise, mood and so on. However, this change will generally remain within the normal temperature range. If the human body is in a state of "abnormal body temperature", such as the south, the North Pole or illness, it will lead to the body temperature exceeding the normal range, lower than 36℃ or higher than 37℃, leading to the reduction or acceleration of human metabolism. I don't know how many people still remember the "100-kilometer cross-country race accident of Baiyin Shilin Mountain Marathon in Gansu". The main reason for the accident is that the temperature of some contestants is lower than 36℃ due to "great weather change".

To sum up, we can call the temperature of "maintaining the normal operation of human life" normal body temperature. Keeping the body temperature in this state can better carry out metabolism and is the best temperature to convert substances into heat energy. In addition, the body temperature in different parts of the human body is different. For example, the rectal temperature of human body is higher than 37℃, while the temperature of armpit is between the normal body temperature range, and the body temperature measured when sick is mostly "armpit".

What is somatosensory temperature? The somatosensory temperature is special. There is no fixed standard. Only according to the perceptual state of human skin and the change of external environment, combined with natural factors, such as temperature, water vapor pressure, humidity, wind speed and so on. Determine a temperature that "the human body feels most comfortable". This is how the "somatosensory temperature" heard in the weather forecast is produced.

Simply put, body temperature refers to how the human body feels about the outside world. When the environment (temperature) makes the human body feel comfortable, it is the "optimal somatosensory temperature". When the external environment is cold or hot, the human body will feel uncomfortable. In meteorology, people use "wind chill index" and "heat index" to measure "discomfort".

In addition, the optimal somatosensory temperature is set for human groups, but this standard is not static and will change due to individual factors and changes in the external environment. Some people will feel comfortable at the same temperature, but others will feel uncomfortable.

When the temperature is 37℃, people will feel very hot? Excluding geographical and individual factors, the optimal somatosensory temperature of human body is 18~28℃, which is slightly higher in winter and slightly lower in summer. The human body will neither feel too hot nor too cold in this temperature environment. But this is not the limit for human body to feel temperature. The human body can tolerate the high temperature above 100℃ in a dry environment, and can survive and move with warm clothes in an environment below 0℃.

However, it needs to be clear that maintaining normal body temperature is to maintain normal metabolism, but it does not mean that the human body likes to be in an environment around 37℃. You should know that there are a lot of sweat glands and sebaceous glands on the surface of human skin. When the outside temperature rises, the metabolism in the human body will be accelerated, and the skin will have a "breathing phenomenon" to discharge a lot of sweat or sebum, so as to adjust the gradient of the human body. When the temperature reaches 37℃,

In addition, somatosensory temperature and temperature are two different things. The somatosensory temperature ≠ temperature is affected by the ratio of temperature and humidity in the air. For example, in rainy weather in summer, although the temperature is high, the somatosensory temperature is lower than the temperature because of the relatively high air humidity. Therefore, even if the normal body temperature of the human body is between 36 and 37℃, it does not mean that people like to stay in the environment of 37℃, because it is obviously beyond the range of "the best somatosensory temperature of the human body".