<P> The epiglottis is normally pointed upward during breathing with its underside functioning as part of the pharynx . During swallowing , elevation of the hyoid bone draws the larynx upward ; as a result , the epiglottis folds down to a more horizontal position , with its superior side functioning as part of the pharynx . In this manner , the epiglottis prevents food from going into the trachea and instead directs it to the esophagus , which is at the back . Should food or liquid enter the windpipe due to the epiglottis failing to close properly , the gag reflex is induced to protect the respiratory system . </P>
what is the purpose of the epiglottis in the respiratory system of humans
prevents food from going into the trachea and instead directs it to the esophagus