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DETAILED HISTOLOGY OF INTRAPUMONARY BRONCHI

DETAILED HISTOLOGY OF INTRAPUMONARY BRONCHI

SECONDARY BRONCHUS: It has histology almost similar to that of primary bronchus .

 

TERTIARY BRONCHUS: The epithelium is tall columnar but not pseudostratlfled. Goblet cells are fewer in number.

The lamina propria is thin, elastic and completely encircled by smooth muscles arranged in a spiral manner.

The submucosa has fewer glands.

Cartilage framework is reduced to few Irregular plates. The submucosa merges with adventitia and then with alveoli.

 

SMALLER BRONCHI: In the wall of smaller bronchi, the hyaline cartilage is present as small isolated cartilagenous plates or islands of cartilage called Insulae cartllagenae.

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