【摘 要】
：
人的鼻腔里,血管很多,构成了海绵状血管网,使鼻腔的血液循环旺盛。当鼻子吸进冷空气,进入肺部时,已经接近体温。人体的这种生理功能,通过锻炼可以得到增强。如果整天戴口罩,
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人的鼻腔里,血管很多,构成了海绵状血管网,使鼻腔的血液循环旺盛。当鼻子吸进冷空气,进入肺部时,已经接近体温。人体的这种生理功能,通过锻炼可以得到增强。如果整天戴口罩,鼻腔及整个呼吸道的黏膜得不到锻炼,稍微受寒,就容易感冒。还有一些人在寒冷时,喜欢把围巾当口罩,这样很不卫生。围巾中的原料多是羊毛、化纤织物,带有不利于人体健康的物质。人在呼吸时,纤维和细菌等会吸入肺部,对健康极为不利。
Human nasal cavity, many blood vessels, forming a cavernous network, so that nasal blood circulation. When the nose inhaled cold air, into the lungs, it is close to body temperature. This physiological function of the body can be enhanced through exercise. If you wear masks, nasal passages and mucous membranes of the respiratory tract are not exercise, a little cold, it is easy to catch a cold. Some people also like to wear scarves as masks in cold weather, which is very unhealthy. Scarves are mostly raw materials, wool, chemical fiber fabrics, with substances that are not conducive to human health. When people breathe, fibers and bacteria can inhale into the lungs, which is extremely detrimental to health.
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