Bronchus

A higher magnification image shows the details of the bronchial wall. The mucosa consists of a pseudostratified columnar epithelium with cilia and goblet cells, a lamina propria rich in elastic fibers and a prominent circularly-arranged smooth muscle layer. The submucosa contains mixed, sero-mucous glands and larger bronchial blood vessels. Cartilage plates are present in the outer fibrocartilagenous layer. 200x

A higher magnification image shows the details of the bronchial wall. The mucosa consists of a pseudostratified columnar epithelium with cilia and goblet cells, a lamina propria rich in elastic fibers and a prominent circularly-arranged smooth muscle layer. The submucosa contains mixed, sero-mucous glands and larger bronchial blood vessels. Cartilage plates are present in the outer fibrocartilagenous layer. 200x

A higher magnification image shows the details of the bronchial wall. The mucosa consists of a pseudostratified columnar epithelium with cilia and goblet cells, a lamina propria rich in elastic fibers and a prominent circularly-arranged smooth muscle layer. The submucosa contains mixed, sero-mucous glands and larger bronchial blood vessels. Cartilage plates are present in the outer fibrocartilagenous layer. 200x

A higher magnification image shows the details of the bronchial wall. The mucosa consists of a pseudostratified columnar epithelium with cilia and goblet cells, a lamina propria rich in elastic fibers and a prominent circularly-arranged smooth muscle layer. The submucosa contains mixed, sero-mucous glands and larger bronchial blood vessels. Cartilage plates are present in the outer fibrocartilagenous layer. 200x

Cartilage plates, rather than cartilage rings, maintain patency in a secondary bronchus.

Bronchial blood vessels lie within the wall of each bronchus, supplying the tissues of the wall.

Alveoli surrounding this secondary bronchus indicate that this passageway is intrapulmonary.