Arbor bronchialis, the bronchial tree (human, adult)

Resin corrosion cast of the lower trachea and bronchial tree (posterior aspect). The lobar and segmental bronchi and their main branches are coloured, different colours indicate areas supplied by different segmental bronchi. White-coloured lower trachea (Tr) divides into two principal bronchi (Bp): On the left side the bronchus principalis sinister (Bp) divides into (A) bronchus lobaris superior sinister (white) that divides again into: (1+2) bronchus segmentalis apicoposterior; (3) bronchus segmentalis anterior; (4) bronchus lingularis superior; (5) bronchus lingularis inferior; and into (B) bronchus lobaris inferior sinister (white) that divides again into: (6) bronchus segmentalis apicalis (superior); (7) bronchus segmentalis basalis anterior; (8) bronchus segmentalis basalis lateralis; (9) bronchus segmentalis basalis posterior On the right side the bronchus principalis dexter (Bp) divides into (A) bronchus lobaris superior dexter (white) divides again into: (1) bronchus segmentalis apicalis (2) bronchus segmentalis posterior (3) bronchus segmentalis anterior and into (B) bronchus lobaris medius dexter (not visible) that divides again into: (4) bronchus segmentalis lateralis (5) bronchus segmentalis medialis and into (C) bronchus lobaris inferior dexter (white) divides again into: (6) bronchus segmentalis apicalis (superior) (7) bronchus segmentalis basalis medialis (cardiacus) (8) bronchus segmentalis basalis anterior (9) bronchus segmentalis basalis lateralis (10) bronchus segmentalis basalis posterior