Which structure is responsible for closing off the larynx during swallowing?Multiple Choicesphincterepiglottistonguepharynx

The structure responsible for closing off the larynx during swallowing is the epiglottis.

Explanation:

1. When you swallow, the epiglottis folds down over the larynx (voice box) to prevent food and liquids from entering the airways.
2. This action is critical for protecting the respiratory tract and ensuring that ingested materials travel down the esophagus instead.
3. The other options:
   • Sphincter: Typically refers to circular muscles that constrict openings but does not specifically refer to closing the larynx.
   • Tongue: While it plays a role in pushing food toward the throat, it does not close off the airway.
   • Pharynx: This is part of the throat that is involved in both respiratory and digestive functions but does not directly close off the larynx during swallowing.

Conclusion:

In summary, the correct answer is epiglottis as it effectively covers the larynx during the swallowing process to prevent aspiration.