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प्रश्न
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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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संबंधित प्रश्न
Explain with reasons.
Upward and downward movement of diaphragm occurs consecutively.
Given alongside is a diagrammatic sketch of a kind of part in human lungs.
Name the parts numbered 1-4

The front opening of the wind pipe is guarded by ______.
Discuss the function of the diaphragm in breathing.
Define the term “Trachea”.
____________ is the uppermost part of pharynx.
Which of the following is the structural and functional unit of pulmonary respiration?
Match the following:
| 1. | Human intestine | a. | Blue blood |
| 2. | Crab | b. | White blood |
| 3. | Cockroach | c. | Digestion of fat |
| 4. | Bile | d. | Tape warm |
What are the most important toxic gases in smoke?
