1) The larynx is located between the pharynx and trachea and acts as a protective sphincter for the airway. It consists of cartilages, ligaments, and membranes. 2) The larynx contains several intrinsic muscles that control the opening and closing of the vocal folds and laryngeal inlet. These muscles receive innervation from the recurrent laryngeal nerve and external laryngeal nerve. 3) The blood supply to the upper half of the larynx comes from the superior laryngeal artery while the lower half is supplied by the inferior laryngeal artery. Lymphatic drainage is to the deep cervical nodes.