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Secondary bronchi (also known as lobar bronchi) arise from the primary bronchi, with each one serving as the airway to a specific lobe of the lung.
Additional recommended knowledge
They have relatively large lumens that are lined by respiratory epithelium. There is a smooth muscle layer below the epithelium arranged as two ribbons of muscle that spiral in opposite directions. This smooth muscle layer contains seromucous glands. Irregularly arranged plates of hyaline cartilage surround the smooth muscle. These plates give structural support to the bronchus and maintain the patency of the lumen.
Secondary bronchi of left lung
Secondary bronchi of right lung
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Secondary_bronchus". A list of authors is available in Wikipedia.|