232 



THE RESPIRATORY SYSTEM 



glottis are of the elastic variety of cartilage, and, though frequently 

 much infiltrated with fat, are not, like the hyaline cartilages, sub- 

 ject to ossification. The intrinsic muscles of the larynx, taking 



FlG. 197. A VERTICAL SECTION THROUGH THE LATERAL WALL OF THE HUMAN LARYNX. 



a, cartilage ; J, laryngeal mucosa, clothed with ciliated epithelium ; c, transection of 

 the vocal cord, in this region the mucosa is clothed with stratified epithelium ; rf, ducts 

 of mucous glands ; e, lymphoid nodule ; y, muscle ; ^, mucous glands ; A, submucosa ; 

 *, blood vessel ; F", ventricle of the larynx. Hematein and eosin. Photo, x 8. 



origin from these cartilages, pursue their course beneath the 

 mucous membrane. 



The upper portion of the larynx, including the greater part of 



