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प्रश्न
उत्तर
Structure of Trachea: It is a long thin air tube about 11 cm long and 2.5 cm broad. Its wall is semi-transparent and composed of 4 layers-
- Mucosa
- Submucosa
- Cartilaginous layer
- Adventitia
The trachea in the thoracic region bifurcates into two short tubes called primary bronchi which enters into the lungs.
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