Pronunciation: brong′kŭs, brong′kī
One of two subdivisions of the trachea serving to convey air to and from the lungs. The trachea divides into right and left main bronchi, which in turn form lobar, segmental, and intrasegmental bronchi. Structurally, the intrapulmonary (secondary) bronchi have a lining of pseudostratified ciliated columnar epithelium and a lamina propria with abundant longitudinal networks of elastic fibers; there are spirally arranged bundles of smooth muscle, abundant mucoserous glands, and, in the outer part of the wall, irregular plates of hyaline cartilage.
[Mod. L., fr. G. bronchos, windpipe]
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