human_reference_atlas has part tracheobronchial chondrocyte Homo sapiens organ cartilage of bronchus UBERON:0001956 NCIT:C49209 bronchial cartilage cartilage of bronchus uberon MA:0001835 UMLS:C0225604 EMAPA:35192 bronchial trunk cartilage FMA:62649 bronchial cartilage ring cartilagines bronchiales bronchi cartilage bronchus cartilage AS cartilage of bronchus cartilage of bronchial trunk cartilage of bronchi The hyaline cartilaginous structures that support the bronchi, present as irregular rings in the larger bronchi (and not as regular as in the trachea), and as small plates and islands in the smaller bronchi; as the branching continues through the bronchial tree, the amount of hyaline cartilage in the walls decreases until it is absent in the smallest bronchioles[MP]. SCTID:278980009 main bronchus lobar bronchus segmental bronchus subsegmental bronchus