THE NERVES AND ORGANS OF TASTE 



605 



and probably the upper part of the pharynx, are also endowed with taste. 

 These parts, together with the base and posterior parts of the tongue, are 

 supplied with branches of the glosso-pharyngeal nerve, and evidence has 

 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 



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

 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.) 



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 387 

 and 388. 



The mucous membrane in the regions just mentioned possesses special 

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



