VISCERAL ANATOMY. 135 



space, the glottis, attached in front to thyroid, behind to ary- 

 tenoids. 



Epiglottis with thyroid, by simple ligamentous bands. 



Epiglottis with arytenoids, by some bands, sometimes called the 

 superior or false vocal cords; they contain some cartilaginous 

 bodies (of Wrisberg). 



FIG. 22. 



POSTERO-LATERAL VIEW OF THE LARYNX. 



ring of trachea; 10, n, Infero-posterior extremities of crico-thyroid cartilages. 



Muscles. 



Thyro-hyoid. 



Origin. Outer surface of thyroid cartilage. 



Insertion. Whole hyoid cornua. 



Action. Carries larynx forward and upward. 



Hyo-epiglottideus. 



Origin. Body of hyoid. 



Insertion. Superior face of epiglottis. 



Action. Restores epiglottis to erect position. 



Crico-thyroid. 



Origin. External face of cricoid. 



