VOICE AND SPEECH 



493 



largest of the paired cartilages; they are seated on the upper 



edge of the posterior wide portion of the cricoid, and form 



true joints with it. Each is 



pyramidal with a triangular 



base, and has on its tip a small 



nodule (co, Fig. 145), the carti- 



lage of Santorini. From the tip 



of each arytcnoid cartilage the 



aryteno-epiglottic fold of mucous 



membrane (10, Fig. 146) extends 



to the epiglottis; the cartilage of 



Santorini causes a projection 



(8, Fig. 146) in this, and a little 



farther on (9) is a similar emi- 



nence on each side, caused by 



the remaining pair of cartilages, 



known as the cuneiform, or car- 



tilages of Wrisberg. 



The Vocal Cords are bands of 

 elastic tissue which reach from 

 the inner angle (Pv, Fig. 145) of 

 the base of each arytenoid carti- 

 lage to the angle on the inside 

 of the thyroid where the sides 

 of the V unite; they thus meet 

 in front but are separated at of , " ^f^P* ha ? bw . Il l dividedand its 



r edges (11) turned aside. 1, body of 



their Other ends. The COrds hyoid; 2, its small, and 3, its great, hunts; 



, , . 4, upper and lower horns of thyroid car- 



are not, however, bare Strings, tilage; 5, mucous membrane of front of 



likp thrxso of n Vinrn hilt pnvprprl P harvnx . covering the back of the cricoid 



)i a narp, out coveieu carti f agt . ; 6> upper cnd of Kunet . 7f 



Over With the lining mUCOUS windpipe, lying in front of the gullet; 

 rii T ' 9 mmence caused by cartilage of San- 



membrane of the larynx, a slit, torini; 9, emineaoe cannd b\- cartilage 



,1 ,r in-/ T\' i Af>\ of Wrisberg; both lie in, 10, tlie aryteno- 



Called the glOttlS (C, Jblg. 140), ep igloUic foldoi mucous membrane, sur- 



being left between them. It is 



the projecting cushions formed t'p of epiglottis; c, the glottis, the lines 



. . leading from the latter point to the free 



by them On each Side Of thlS vibratory edges of the vocal cords. /,', 



slit which are set in vibration edges? marking them ^M&m *"! 

 during phonation. Above each nences 6 - are the fabe voral l ' linls - 

 vocal cord is a depression, the ventricle of the larynx (b', Fig. 146); 

 this is bounded above by a somewhat prominent edge, the false 



