Scheme survey frontal section of larynx (human)

Stain: Azan. A pseudostratified epithelium covers the mucosa of the laryngeal cavity and vestibulum. At the vocal fold edge (3) the epithelium appears to be nonkeratinizing squamous. The connective tissue is rigidly attached to this edge and merges into the vocal ligament (dense elastic) and vocal muscle. (3) transition of pseudostratified epithelium into squamous epithelium; (5) seromucous glands; (6) ventriculus laryngis; (7) plica ventricularis, with mixed laryngeal glands; (8) ligamentum vocale as part of the plica vocalis, covered with squamous epithelium; (9) vocal muscle; (10) thyreoarytenoid muscle (pars lateralis); (11) ventricular recess (sacculus laryngis); (12) pseudostratified epithelium.