subsegmental bronchus

A subsegmental bronchus is a small bronchus that branches from a segmental bronchus and supplies a subsegmental unit of lung tissue within a bronchopulmonary segment.

Located within each bronchopulmonary segment, subsegmental bronchi branch progressively from segmental bronchi and continue to divide into smaller bronchioles.

The subsegmental bronchus distributes air to smaller units of lung parenchyma and is accompanied by corresponding pulmonary arteries and veins for gas exchange.

Each subsegmental bronchus originates from a segmental bronchus and branches into multiple smaller bronchioles that eventually become respiratory bronchioles.

Subsegmental bronchial anatomy is relevant for localizing pneumonia, atelectasis, and lung lesions; understanding branching patterns aids in bronchoscopic navigation.