Air enters the nasal cavity through:
Correct answer: D. Nostrils
- A. Lungs
- B. Bronchi
- C. Trachea
- D. Nostrils
Explanation
Nostrils; These are the openings to the nasal cavities that are on the face. Air enters the nasal cavity through these openings
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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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