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痰是人体呼吸道排泄出来的一种分泌物,它是通过支气管纤毛运动上皮纤毛的运动,从肺部向上呼吸道推动,最后,通过人的正常咳嗽反射从气管内咳出排出体外,即便是健康人也有。其能湿润黏膜,吸附空气中的灰尘和微生物。当人吸入刺激性气体、尘埃、致病细菌、病毒等有害微生物时,上呼吸道就可能发生炎症,或者伴有呼吸系疾病,呼吸道分泌的这种少量黏液就会增加,痰量就会增多,同时痰的性质也会发生变化,在这些痰液里存在着许多致病微生物。如果不注意环境卫生,随地吐痰,致病物可能会蒸发到空气中,呼吸一些带有病菌的空气,很容易影响其他人的身体健康。但是强忍吞下,痰里面含有大量细菌,仅有一少部分可能会被胃液杀死,绝大部分仍然活着,从而有可能引起肠道疾病。
Sputum is a secretion excreted by the respiratory tract of the human body. It is promoted by the movement of the bronchial ciliary motility epithelial cilia and upward from the lungs. Finally, it is excreted from the trachea by normal human cough reflex, even in healthy people There is also It can moist mucosa, adsorption of airborne dust and microorganisms. When people inhale irritating gases, dust, pathogenic bacteria, viruses and other harmful microorganisms, the upper respiratory tract inflammation may occur, or accompanied by respiratory diseases, respiratory secretions of this small amount of mucus will increase, the amount of sputum will increase, At the same time the nature of sputum will change, there are many pathogenic microorganisms in these sputum. If you do not pay attention to environmental hygiene, spitting, the pathogen may evaporate into the air, breathe some bacteria with the air, it is easy to affect the health of others. But to forcibly swallow, there is a lot of bacteria in the sputum, only a small part may be killed by gastric juice, the vast majority are still alive, which may cause intestinal diseases.