Right apical segmental bronchus (B1)

Bronchus segmentalis apical

RespiratoryOrgansThoraxRight side

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What it is
Segmental (tertiary) bronchus B1, supplying the apical bronchopulmonary segment of the right upper lobe.
Function
Conducts air to one bronchopulmonary segment, a pyramidal unit of lung with its own bronchus and segmental artery.
Size
About 4 cm long and 4–6 mm in diameter; its wall holds irregular cartilage plates.
Clinical note
The apical segments of the upper lobes are the classic site of post-primary (reactivation) tuberculosis.

Nearby respiratory structures Bronchus intermedius, Carina of trachea, Left main bronchus, Right anterior segmental bronchus (B3), Right lower lobe bronchus, Right lung, upper lobe, Right main bronchus, Right middle lobe bronchus, Right posterior segmental bronchus (B2), Right upper lobe bronchus