Left upper lobe bronchus

Bronchus lobaris superior sinister

RespiratoryOrgansThoraxLeft side

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What it is
Leaves the left main bronchus at the hilum and divides into an upper division (apicoposterior and anterior) and a lingular division.
Function
Secondary (lobar) bronchus: conducts air to one lobe of the lung.
Size
About 1–1.5 cm long, 8–10 mm wide.
Clinical note
Lobar bronchi are the level at which the lung is removed in a lobectomy; their walls contain irregular cartilage plates instead of rings.

Nearby respiratory structures Bronchial tree (subsegmental bronchi), Left anterior segmental bronchus (B3), Left apicoposterior segmental bronchus (B1+2), Left inferior lingular segmental bronchus (B5), Left lower lobe bronchus, Left lung, upper lobe (with lingula), Left main bronchus, Left superior lingular segmental bronchus (B4), Left superior segmental bronchus (B6), Visceral pleura