Which structure acts as a flap to prevent food from entering the airway during swallowing?

Which structure acts as a flap to prevent food from entering the airway during swallowing?

• A. Epiglottis
• B. Arytenoid
• C. Cricoid
• D. Hyoid

Answer: (A)

Protection of the airway during swallowing relies on a flap that covers the entrance to the larynx. The epiglottis is that lid-like piece of leaf-shaped cartilage at the top of the larynx. When you swallow, the larynx rises and the epiglottis tilts downward and backward to seal over the glottis, stopping food or liquid from entering the airway. This movement is coordinated with ligaments that attach the epiglottis to the hyoid bone and thyroid cartilage, ensuring a reliable seal during swallowing. The other structures—arytenoids, cricoid, and the hyoid bone—have different roles in voice, airway support, and tongue–larynx stabilization, but they do not function as the protective flap blocking the airway.

Protection of the airway during swallowing relies on a flap that covers the entrance to the larynx. The epiglottis is that lid-like piece of leaf-shaped cartilage at the top of the larynx. When you swallow, the larynx rises and the epiglottis tilts downward and backward to seal over the glottis, stopping food or liquid from entering the airway. This movement is coordinated with ligaments that attach the epiglottis to the hyoid bone and thyroid cartilage, ensuring a reliable seal during swallowing. The other structures—arytenoids, cricoid, and the hyoid bone—have different roles in voice, airway support, and tongue–larynx stabilization, but they do not function as the protective flap blocking the airway.