The lower lobe bronchus is very short. It divides into the apical segmental bronchus of the left lower lobe (B6), and the basal bronchi ; anterobasal (B8), laterobasal (B9), and posterobasal (B10).

There is no mediobasalis on the left.

apical segmental bronchus of the left lower lobe (B6)

anterobasal (B8), laterobasal (B9), and posterobasal (B10)