MUSCLES OF THE LARYNX. 



339 



Fig. 98) is narrow in front and wider behind: under such 

 circumstances air driven through the opening does not set 

 the margins of the cords in vibration, and no sound is pro- 

 duced. 



The Muscles of the Larynx, The laryngeal muscles 



FIG. 98. The larynx viewed from its pharyngeal opening. The back wall of 

 the pharynx has been divided and its edges (11) turned aside. 1, body of hyoid; 

 2, its small, and 3, its great, horns; 4, upper and lower horns of thyroid car- 

 tilage; 5, mucous membrane of front of pharynx, covering the back of the cri- 

 coid cartilage; 6, upper end of gullet; 7, windpipe, lying in front of the gullet; 

 8, eminence caused by cartilage of Santorini: 9, eminence caused by cartilage of 

 Wrisberg; both lie in, 10, the aryteno-epiglottidean fold of mucous membrane, 

 surrounding the opening (aditus laryngis) from pharynx to larynx. , project- 

 ing tip of epiglottis; c, the glottis, the lines leading from the letter-point to the 

 free vibrating edges of the vocal cords. &', the ventricles of the larynx: their 

 upper cd~cs, marking them off from the eminences 6. are the false vocal cords. 



