Which structure prevents swallowed material from entering the trachea during swallowing?

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Multiple Choice

Which structure prevents swallowed material from entering the trachea during swallowing?

During swallowing, protecting the airway hinges on a lid-like structure that covers the opening to the trachea. The epiglottis acts as that lid: as you swallow, the larynx rises and the epiglottis folds down to seal the glottis, directing the bolus into the esophagus and preventing material from entering the trachea. The other structures aren’t doing this specific job. The uvula mainly helps close the nasal cavity during swallowing, not the airway. The esophagus is the passage the food enters after swallowing, not the airway-protecting mechanism. The larynx is the airway itself, but the actual prevention of entry into the trachea is accomplished by the epiglottis covering the airway opening.

During swallowing, protecting the airway hinges on a lid-like structure that covers the opening to the trachea. The epiglottis acts as that lid: as you swallow, the larynx rises and the epiglottis folds down to seal the glottis, directing the bolus into the esophagus and preventing material from entering the trachea.

The other structures aren’t doing this specific job. The uvula mainly helps close the nasal cavity during swallowing, not the airway. The esophagus is the passage the food enters after swallowing, not the airway-protecting mechanism. The larynx is the airway itself, but the actual prevention of entry into the trachea is accomplished by the epiglottis covering the airway opening.

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