148 



THE ORGANS OF TASTE. 



THE ORGANS OF TASTE. 



THE gustatory organs are represented by certain patches or groups of peculiarly 

 modified epithelium cells which are lodged in the thickness of the stratified epithe- 

 lium of certain parts of the tongue and pharynx. These groups of cells have in 

 mammals a bud-like arrangement and have therefore been termed taste-buds. They 

 occur in man at the sides of the papillae vallatse of the tongue, forming a zone around 

 the papillae and also upon the opposed wall of the vallum. They are also found on 



Fig. 167. PAPILLARY SURFACE OP THE TONGUE, WITH THE FAUCES AND TONSILS. (Sappey.) 



1, 2, circumvallate papillae ; 3, fungiform papillse ; 4, 5, filiform and conical papillae : 6 glands 

 and glandular recesses ; 7, tonsils ; 8, tip of the epiglottis ; 9, frsenum epiglottidis. 



the fungiform papillse of the back and sides of the tongue, extending to the lip, and 

 here and there in the epithelium covering the general surface of the same parts of 

 that organ. They are especially numerous over a small area just in front of the 

 anterior pillar of the fauces (fimlria lingua). This area usually displays four or 

 five longitudinal folds or elevations of the mucous membrane and appears to 

 represent a much better defined oval laminated structure which is found in a similar 

 situation in the tongue of some mammals (e.g., rabbit), and which is known as the 



