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 arytenoid 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 



e ,i -rr -, ,1 ,1 FIG. 146. The larynx viewed from 



Of the V Unite; they thus meet its pharyngeal opening. The back wall 



in front but are separated at *> fl^J^d 'SftW o? 



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



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



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



likp thn^p of a Vmrn hnt rnvprpd P har y nx > covering the back of the cricoid 

 11K6 those 01 a harp, DUt COVei d cartilage; 6, upper end of gullet; 7, 



OVer with the lining muCOUS windpipe, lying in front of the gullet; 



8, eminence caused by cartilage of San- 



membrane Of the larynx, a silt, torini; 9, eminence caused by cartilage 



11 i ,1 7 , , / -r-i- -i 4n\ of Wrisberg; both lie in. 10, the aryteno- 



Called the glottis (C, Fig. 146), epi glotUc fold of mucous membrane, sur- 



being left between them. It is 



the projecting cushions formed tip of epiglottis; c, the glottis, the lines 



. . leading from the latter point to the free 



by them On each Side OI this vibratory edges of the vocal cords. 6', 



^'4. U* 1, 4- ' *U,.^+,V^ the ventricles of the larynx; their upper 



slit which are set in vibration edges> marking them & fl ^ m the . 



during phonation. Above each nences b, are the false vocal cords. 



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

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



