Biology for IGCSE & O level - Gas Exchange In Humans (Section 4 - No. 27)
What is the role of the epiglottis?
To filter air pollutants.
To prevent food from entering the trachea.
To facilitate gas exchange.
To regulate the rate of breathing.
Explanation
The epiglottis is a flap of cartilage that covers the opening of the trachea during swallowing to prevent food from entering the airway.
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