THE SENSES 



been already adduced that this is the principal nerve of the sense of taste. 

 The anterior parts of the tongue, especially the edges and tip, are innervated 

 by fibers from the lingual branch of the fifth, but which arise in the ganglion 

 of the pars intermedia and are distributed in the chorda tympani, figures 250 

 and 412. 



FIG. 422. Papillar Surface of the Tongue, with the Fauces and Tonsils, i, Circum- 

 vallate papillae, in front of 2, the foramen cecum; 3, fungiform papillae; 4, filiform and 

 conical papillae; 5, transverse and oblique rugae; 6, mucous glands at the base of the tongue 

 and in the fauces; 7, tonsils; 8, part of the epiglottis; 9, median glosso-epiglottidean fold 

 (frenum epiglottidis). (From Sappey.) 



The mucous membrane in the regions just mentioned possesses special 

 epithelial structures called taste buds. The taste buds are very abundant 

 in the side walls of the circumvallate papillae. They are also present in the 

 fungiform papillae, in the foliate papillae, and in the mucous membrane. 

 The taste bud is located at the deeper part of the stratified epithelium, is 



