Finally, in the bronchi, but not the bronchioles, there is also a layer of cartilage below the submucosa which stiffens the bronchus and helps to keep it open.

最后，在某支气中，黏液下层之下还有一层软骨；软骨可以使支气变硬并且持开放。

Have you tried to intubate her left bronchus?

有没有试进左支气？

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，气分为两个分支，称为支气。每个支气通向一个单独的肺部并逐级分支，形成一级比一级细小的道，有点像树枝。