The lateral glossoepiglottic folds are partly attached to the wall of the pharynx. They are formed by the anterior and lingual surface of the epiglottis, which is curved and covered on its cranial free part by mucous membrane, which is reflected onto the sides and roof of the tongue. The depressions between the epiglottis and the root of the tongue, on either side of the medial fold, are called the valleculae.