吸入的空气穿过气管。人体有两叶肺。肺是粉红色的糊状体,像海绵一样。肺部由肋笼保护。人体左侧的肺比右肺更小,因为左侧的心脏同样需要空间。肺的下部是膈肌。它与肺部协同工作使人体进行吸气和呼气。当一个人的吸气,膈肌收缩,肺部充满空气。
The end of the trachea is located between the two lungs. At the bottom of the trachea are a couple of large tubes called bronchi. The bronchi lead into the lungs. One tube sends air into the left lung, and the other tube sends air into the right lung.
气管的尾部在两肺之间。在气管的底部有几个大的管道成为支气管。支气管与肺部直接相连。一个支气管使空气进入左肺和另一支气管使空气进入右肺。
Once the air travels through the bronchi, it will branch off into smaller tubes called bronchioles. The bronchioles are about the thickness of a hair, and there are about 30,000 in each lung. From the bronchioles the air then continues its journey to tiny air sacs located throughout the lungs. The tiny air sacs are called alveoli.
空气进入支气管后,它将岔开成更小的细支气管。细支气管约为与头发粗细相当,每个肺约有30,000个细支气管。进入细支气管空气再继续穿过遍布肺部的微小气囊。而微小气囊被称为肺泡。
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2020-09-15
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