Normal people's body temperature is relatively constant, and it maintains the dynamic balance of heat production and heat dissipation through the role of body temperature regulation centers in the brain and hypothalamus, regulation and neurohumors. Under normal physiological conditions, when the body temperature rises, the body keeps the body temperature relatively constant by reducing heat production and increasing heat dissipation; On the contrary, when the body temperature drops, the heat production increases and the heat dissipation decreases, so that the body temperature is maintained at a normal level.
Normal body temperature is not a specific temperature point, but a temperature range. Deep body temperature is relatively constant and uniform, which is called deep body temperature; However, the surface temperature is affected by many factors, with great changes and differences, which is called surface temperature. Clinical body temperature refers to the average deep temperature.
Generally, it shows the body temperature of the mouth, rectum and armpit, and the rectal body temperature is closest to the deep body temperature. Normal values: oral sublingual temperature is 36.3 ~ 37.2℃, rectal temperature is 36.5 ~ 37.7℃ higher than oral temperature (0.2 ~ 0.5℃), and axillary temperature is 36.0 ~ 37.0℃.
Extended data
The standard of normal body temperature is based on the value of most people, not the absolute value of individuals.
There are differences in body temperature in the morning and evening, in all parts of the human body and between men and women. Normal body temperature has a relatively stable range, but it is not constant. The oral temperature of normal people is 36.3℃ ~ 37.2℃, the axillary temperature is 0.2℃ ~ 0.5℃ lower than the oral temperature, and the rectal temperature is 0.2℃ ~ 0.6℃ higher than the oral temperature.
In a day, the body temperature is the lowest at 2-5 am and the highest at 5-7 pm, but the temperature difference within a day should be less than 0.8℃. In addition, the body temperature of women is generally about 0.35℃ higher than that of men. Women's body temperature will also change slightly during menstruation. In a healthy state, if the diet is normal and the clothes are appropriate, the body temperature of the human body is generally relatively constant, that is, it is kept at around 37℃ (roughly between 36.2℃ and 37.2℃) and does not change with the change of the external environment temperature.
Baidu encyclopedia-human body temperature
Baidu encyclopedia-normal body temperature