Biology for IGCSE & O level - Gas Exchange In Humans (Section 1 - No. 40)
What is the role of the epiglottis?
To filter the air entering the trachea.
To close off the trachea during swallowing.
To regulate the amount of oxygen entering the lungs.
To produce mucus.
Explanation
The epiglottis prevents food and liquids from entering the trachea and lungs during swallowing.
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