The function of the laryngopharynx is to pass food and air. The laryngopharynx is part of the pharynx, which connects the mouth and nasal cavities with the esophagus. Its primary responsibility is to guide food and air to their appropriate locations.
Problems within the pharynx can cause conditions such as Laryngopharyngeal reflux, or LPR. This condition is a malfunctioning of the sphincters, which are located at the ends of the esophagus. LPR causes stomach acid to back up into the pharynx or larynx, or into the back of the nasal cavities. Medical treatment is necessary to avoid permanent damage to the throat and voice box.