Each nasal cavity is subdivided into _ passageway in man.
Correct answer: C. 3
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
The nasal cavity is divided into three regions: the nasal vestibule, the nasal cavity proper or nasal fossa, and the olfactory region. The nasal vestibules are the two entry points into the nasal cavity.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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