MCQ
Cilia of trachea transfers:
- AMucous into pharynx
- BMucous into lungs
- CAir into lungs
- DAir into pharynx
Explanation:
The thin film of mucus accumulated in the oral cavity is cleared by coordinated movement of cilia in the direction towards the pharynx. Thereby, the viscous film of mucus is transported off in the direction towards the mouth, where it is either swallowed or expelled via coughing.
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