THE LAEYNX. 



147 



and communicating directly with the pharynx, and by its 

 means with the nostrils and mouth, is the organ of the voice 

 in man and in mammals. It may be felt on the surface of the 

 neck, a little below the hyoid bones. Experiments on 

 living animals, and observations made on those who have 

 undergone the operation of tracheotomy, that is, of having an 



Fig. 93. White-throated Sajapou. 



aperture made into the windpipe between the lungs and the 

 larynx, prove that the voice is formed in that organ. 



298. The Larynx. The larynx is a short and wide 

 tube, suspended to the lingual bones, and continuous with 

 the trachea or windpipe inferiorly (h, Fig. 94). Its walls are 

 formed of cartilages called thyroid (t), cricoid (c), arytaenoid 

 (a r, Fig. 95). The salient angle of the thyroid felt 

 on the surface of the neck in man, still retains the vulgar 

 name of pomum Adami (a) ; a mucous membrane, con- 

 tinuous with that covering the tongue, mouth, nostrils, and 

 pharynx, lines its interior, and extending downwards into 

 the trachea, becomes the mucous membrane of the lungs 

 themselves. In the interior of the organ, this mucous 



L2 



