Biology for IGCSE & O level - Gas Exchange In Humans (Section 2 - No. 34)
Which structure prevents food from entering the trachea?
Larynx
Pharynx
Epiglottis
Glottis
Explanation
The epiglottis is a flap of cartilage that closes over the trachea during swallowing to prevent food from entering the lungs.
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