2G2 



HITCHCOCK'S ANATOMY 



frequently become considerably ossified in males in ad- 

 vanced age. 



The Vocal Cords or ligaments are folds of white fibrous tis- 

 sue, covered by mucous membrane, and are made to vibrate 

 when the air is forced over them. Hence ulceration, or any 



Fig. 261. Fig. 262. 



A View of the Larynx from above, 

 showing the Thyreo- Arytenoi J or Vocal 

 Ligaments. 1, Superior Edcre of the La- 

 rynx. 2, Its Anterior Face. 3, Cornua 

 Majorcs of the Thyroid Cartilage. 4, Pos- 

 terior Face of the Cricoid Cartilage. 5, 5, 

 Arytenoid Cartilages. 6, 6, Thyreo-Ary- 

 tenoid Ligaments. 7, Their Origin within 

 the Angle o the Thyroid Cartilage. S, 

 Their Terminations at the Base of the 

 Arytenoid Cartilages. 9, The Glottis. 10, 

 Anterior Part of the Inferior Surface of 

 the Cricoid Cartilage. 



Muscles of Human Larynx. G. K H. 

 Thyroid Cartilage, r. iv. X. w. Cricoid. 

 JV. F. Arytenoid. T. V. Vocal Ligaments. 

 2T, X. V. K. f. and. N. I. Muscles of La- 

 rynx. 



alteration in the structure of these cords, will produce hoarse- 

 ness, a loss of intonation — a whispering — or some change in 

 the quality of the voice. The cords just mentioned are not, 

 however, the only ones that exist in the larynx, for these are 

 the upper ones, while another pair called the inferior cords, 

 exist below the others, leaving a cavity known as the ventricle 

 of the larynx, (Fig. 263, p. 263), which seems essential to* 

 the proper production of sound : although there is nothing 

 analogous to it in the ordinary musical instruments. The 

 muscles connected with the larynx are eight : five of them 



What is the epiglottis? Of what are the vocal cords composed?- What is the ven- 

 tricle of the larynx ? How many muscles belong to the larynx ? 



