Epiglottis

Description

Superior to the thyroid cartilage, the epiglottis appears as a leaf shaped elastic cartilage plate curving posteriorly toward the laryngeal inlet, its broad upper margin projecting toward the tongue base while the narrower stalk (petiolus) descends toward the inner surface of the thyroid cartilage. Anteriorly, the vallecula lies between the median glossoepiglottic fold and the paired lateral glossoepiglottic folds, a shallow depression that frames the epiglottic lingual surface. Inferior to the epiglottis, the cricoid cartilage forms a complete ring, and posteriorly the arytenoid cartilages sit atop the cricoid lamina, establishing the posterior boundary of the rima glottidis and the attachments for the vocal folds. Red rendered intrinsic laryngeal muscles wrap the cartilages, emphasizing the muscular control of arytenoid position relative to the airway. Clinical context centers on airway protection and laryngoscopic landmarks. Vallecular placement of a Macintosh blade during endotracheal intubation indirectly elevates the epiglottis via the hyoepiglottic ligament, while direct elevation becomes relevant when the epiglottis is long, omega shaped, or otherwise obscures the glottic opening. Swallowing dysfunction, epiglottitis, and post radiation laryngeal edema all alter the relationship between the epiglottis and supraglottic structures, changing aspiration risk and making the pre epiglottic space a key site for staging supraglottic laryngeal carcinoma. Use this plate in head and neck anatomy teaching to anchor discussions of supraglottic versus glottic compartments, in anesthesia and emergency medicine materials covering intubation technique and difficult airway anatomy, or in otolaryngology publications illustrating the cartilaginous framework relevant to microlaryngoscopy and laryngeal framework surgery. Anatomical accuracy verified by SciePro's Medical Advisory Board.