The laryngeal cavity starts as the the laryngeal inlet, and ends at the cricoid cartilage which is continous with the trachea below. The larynx is divided at the vocal folds into the vestibule (supraglottic cavity) above and infraglottic cavity below. The two vocal folds form the glottis, with the space in between being known as the rima glottidis.

The vestibule is supplied by the superior laryngeal nerve and superior thyroid artery. It includes the laryngeal inlet, which communicates between the larynx with the pharynx and whose boundaries are the epiglottis anteriorly, arytenoid cartilages posteriorly, and aryepiglottic folds laterally. Between the vestibular and vocal folds, the vestibule herniates into the saccule of the larynx, which contains mucous glands that lubricate the vocal folds.

The infraglottic cavity is narrow at the vocal folds and widens towards the cricoid cartilage before continuing as the trachea inferiorly. It is supplied by the recurrent laryngeal nerve and inferior thyroid artery.