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吸烟与慢性阻塞性肺病

ID: ANH16179chis
医疗动画文字记录:吸烟会损害肺部的两个主要部分,呼吸道,也叫支气管,和小气囊,也叫肺泡。随着每次呼吸,空气会顺着气管,通过支气管进入肺部。然后空气进入成千上万个微小的肺泡,空气中的氧气进入血液,废物二氧化碳排出血液。被称为纤毛的细小突起排列在支气管上,将肺部的有害物质排出体外。香烟的烟雾会刺激支气管内壁,导致它们膨胀并产生黏液。香烟的烟雾也会减慢纤毛的运动,导致一些烟雾和黏液停留在肺部。当你睡觉时,一些纤毛会恢复,并开始将更多的污染物和黏液排出肺部。当你醒来时,机体试图通过反复咳嗽排出这种物质,这种情况被称为吸烟者的咳嗽。随着时间的推移,纤毛停止工作,呼吸道被瘢痕和黏液堵塞,呼吸变得困难,就会发生慢性支气管炎。肺更容易受到进一步疾病的影响。香烟的烟雾也会损害肺泡,使氧气和二氧化碳更难与血液交换。随着时间的推移,进入血液的氧气越来越少,你可能会患上肺气肿,在这种情况下,你每次呼吸都必须喘气,并在鼻子下戴着氧气管才能呼吸。慢性支气管炎和肺气肿统称为慢性阻塞性肺病(COPD)。慢性阻塞性肺病是一种呼吸功能的逐渐丧失,目前还无法治愈。

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