In the region of the mediastinum, the trachea divides into two branches called bronchi. Each bronchus leads to a separate lung and divides and subdivides into smaller and finer tubes, somewhat like the branches of a tree.
在纵隔区域,气管分为两个分支,称为支气管。每个支气管通向一个单独肺部并逐级分支,形成一级比一级细小管道,有点像树枝。