The epiglottis is the flap that helps prevent food from entering the human windpipe during swallowing.
It is a leaf-shaped structure made mainly of elastic cartilage. Located behind the tongue and above the larynx, it helps direct swallowed material toward the esophagus. During swallowing, movements of the larynx and surrounding tissues cover the entrance to the airway, while the epiglottis contributes to protecting it.
The epiglottis is not a simple lid that independently seals the airway. Modern anatomical descriptions emphasize the coordinated movement of the larynx, tongue, pharynx, and epiglottis. Breathing and swallowing are carefully timed because food entering the trachea can trigger coughing or cause choking.
The uvula and soft palate have different roles. They help close the nasal passage during swallowing, while the vocal folds lie inside the larynx and vibrate for voice production. Inflammation of the epiglottis, called epiglottitis, can dangerously obstruct the airway.