VISCERAL ANATOMY. I35 



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

 tenoids. 



Epiglottis with thyroid, by simple hgamentous 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-LATFRAL VIEW OF THE LARYNX. 



I, Epiglottis; 2, Arytenoid cartilages; 3, Thyroid cartilage; 4, Arytenoideus muscle: 5, Crico- 

 arjnenoideus lateralis ; 6, Thyro arytenoideus: 7, Crico-arytenoideus posticus; 8, Crico- 

 thyroideus: 9, Ligament between the cricoid cartilage and first 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. 



l7isertio7i. — Superior face of epiglottis. 



Action. — Restores epiglottis to erect position. 



Crico-thyroid. 



Origin. — External face of cricoid. 



