Survey form and answers on the impact of air humidity
Moist air is harmful to the human body at any temperature.
Research shows that when the humidity is too high, the pineal gland in the human body secretes a larger amount of pineal hormone, which causes the concentration of thyroxine and epinephrine in the body to decrease relatively, and the cells become If people are "lazy", they will be listless and depressed. People who work and live in places with high humidity for a long time are also prone to rheumatism; when the humidity is too low, evaporation is accelerated, and the dry air can easily take away moisture from the human body, drying the skin and irritating the nasal mucosa, so the dry and cold air in autumn and winter When invaded, respiratory symptoms can easily be induced. In addition, too high or too low air humidity is conducive to the reproduction and spread of some bacteria and viruses. Scientific measurements show that when the air humidity is higher than 65% or lower than 38%, germs reproduce the fastest. When the relative humidity is between 45% and 55%, germs die faster.
Relative humidity usually acts on the human body together with temperature and air pressure. Modern medical meteorological research shows that the appropriate relative humidity for the human body is: when the room temperature is 25°C in summer, the relative humidity is controlled at 40%-50%, which is more comfortable; when the room temperature is 18°C in winter, the relative humidity is controlled at 60%-70%. During the dog days of summer, due to the effects of high temperature, low pressure, and high humidity, human body sweat is not easily discharged and evaporated after sweating, which makes people irritable, tired, and loses appetite; in winter, the humidity is sometimes too low and the air is too dry, which can easily cause Upper respiratory tract mucosal infection and cold. According to scientific experiments, when the daily change in temperature is greater than 3°C, when the daily change in air pressure is greater than 10 hPa, and when the daily change in relative humidity is greater than 10%, the incidence of arthritis will increase significantly.
The high temperature index that causes human death is also closely related to air humidity. When the temperature and humidity reach a certain limit, the human body's heat cannot be dissipated, and the body temperature will rise to the point that it exceeds the human body's heat tolerance limit, and the person will die. Therefore, Wulan weather, my country's disastrous weather standards are as follows: the highest temperature south of the Yangtze River is higher than 38°C, or the highest temperature reaches 35°C, and the relative humidity is higher than 61%; the highest temperature north of the Yangtze River reaches 35°C, or The maximum temperature reaches 30℃, while the relative humidity is higher than 64%.
In summer, when the humidity increases and the water vapor becomes saturated, it will inhibit the body's heat dissipation function, making people feel very stuffy and irritable. In winter, when the humidity increases, heat conduction will be accelerated by about 20 times, making people feel colder and more depressed. Due to damage to the joint synovium and surrounding tissue in the affected area, patients with arthritis have a weakened ability to resist external stimulation and cannot adapt to intense cooling, which may worsen the condition or worsen the pain. If the humidity is too low, a large amount of water will be lost in the upper respiratory tract mucosa, making people feel dry and dry, and may even cause sore throat, hoarseness, and nosebleeds, which may lead to colds. Survey research also shows that when the relative humidity reaches above 90%, 26°C will make people feel like 31°C. Dry air can absorb sweat at the same rate as human sweat glands produce sweat, making us feel cool. However, the air with high humidity is already full of moisture, so it is unable to absorb any more moisture, so sweat has to accumulate on our skin, causing our body temperature to continue to rise, and at the same time, we are overwhelmed mentally and physically.
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