

Chap, xxiii.] MOUTH, PHARYNX, AN 



of the 





i.e., the terminal taste organs. At tne innrcrin ot Tiio 

 tongue, in the region of the circumvallato papilla, 

 there are always a few perriianent folds, which also 

 contain taste goblets. In some domestic animals 

 these folds assume a definite organisation e.g., in the 

 rabbit there is an oval or circular organ composed of 

 numbers of parallel and permanent folds, papillce 

 foliatce. The papillae fungiformes of the rest of the 

 tongue also contain in some places a taste goblet. But 

 most of the taste goblets are found on the papillae cir- 

 cumvallatae and foliatae. In both kinds of structures 

 the taste goblets are placed in several rows close round 

 the bottom of the pit, separating, in the papillae 

 circumvallatae, the papillae fungiformes from the fold 

 of the mucosa surrounding 

 it : in the papillae foliatae 

 the pits are represented by 

 groves separating the indi- 

 vidual folds from one 

 another. 



261. The taste gob- 

 lets or taste buds are 

 barrel-shaped structures 

 (Fig. 112,), extending in a 

 vertical direction through 

 the epithelium, from the 

 free surface to the mucosa. 

 Each is composed of a 

 layer of flattened epithelial 

 cells, elongated in the 

 direction of the goblet, and 

 forming its cover; these 

 are the tegmental cells. 

 The interior of the goblet 



is made up of a bundle of spindle-shaped or staff- 

 shaped taste cells. Each includes an oval nucleus, 

 and is drawn out into an outer and an inner fine 



N 



g, The base of the goblet next the 

 muros.a; ft, the free surface; e, the 

 epithelium of the surface. (Atlas.)' 



