The cartilaginous skeleton of the bronchial tree.
D000818:Animals; D001980:Bronchi / Q000033:anatomy & histology* / Q000166:cytology / Q000196:embryology; D002356:Cartilage / Q000033:anatomy & histology* / Q000166:cytology / Q000196:embryology; D002417:Cattle; D004285:Dogs; D006652:Histological Techniques; D006801:Humans; D008297:Male; D008875:Middle Aged; D009024:Morphogenesis; D051381:Rats; D013194:Staining and Labeling; D014132:Trachea / Q000033:anatomy & histology*