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

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

• A. Epiglottis
• B. Nasal cavity
• C. Trachea
• D. Bronchi

Answer: (A)

During swallowing, protecting the airway is essential. The epiglottis is a leaf-shaped flap of cartilage at the top of the larynx that acts as a switch. As you swallow, the larynx rises and the epiglottis folds downward to cover the opening of the trachea (the glottis). This directs the food bolus toward the esophagus and prevents it from entering the airway. The other structures have different roles: the nasal cavity filters and humidifies air, while the trachea and bronchi are simply air passages to the lungs and do not close off during swallowing.

During swallowing, protecting the airway is essential. The epiglottis is a leaf-shaped flap of cartilage at the top of the larynx that acts as a switch. As you swallow, the larynx rises and the epiglottis folds downward to cover the opening of the trachea (the glottis). This directs the food bolus toward the esophagus and prevents it from entering the airway. The other structures have different roles: the nasal cavity filters and humidifies air, while the trachea and bronchi are simply air passages to the lungs and do not close off during swallowing.