DETAILED HISTOLOGY OF PRIMARY (EXTRAPULMONARY) BRONCHUS

DETAILED HISTOLOGY OF PRIMARY (EXTRAPULMONARY) BRONCHUS

Histology of this is similar to that of trachea except for following differences .

A. Respiratory epithelium is less tall

B. Goblet cells are fewer in number

C. Lamina propria is more dense with large amount of elastic fibers

D. Trachealis muscle spreads out as a discontinuous layer of smooth muscle, which becomes progressively weaker downwards to surround the lumina of bronchi.

E. Submucosa has fewer seromucous glands

F. Cartilages are arranged in flattened Interconnected plates rather C-shaped rings.

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