158 



THE ESSENTIALS OF HISTOLOGY. 



of the soft palate, and on the epiglottis. But they are most easily 

 studied in the papillae foliatae of the rabbit, two small oval areas lying 

 on either side of the back of the tongue and marked transversely with 

 a number of small ridges or laminee with intervening furrows (see 



FIG. 185. TONGUE OF BABBIT, SHOWING THE SITUATION OF THE 



PAPILLA FOLIATE, p. 



figs. 185 and 186). Sections across the ridges show numerous taste- 

 buds embedded in the thick epithelium which clothes their sides. 



The taste-buds are ovoid clusters of epithelium-cells which lie in 

 cavities in the stratified epithelium (fig. 187). The base of the taste- 



FIG. 186. VERTICAL SECTION OF PAPILLA FOLIATA OF THE RABBIT, PASSING 

 ACROSS THE FOLi.E. (Ranvier. ) 



p, central lamina of the corium ; v, section across a vein, which traverses the whole length 

 of the folia : p', lateral lamina in which the nerve-fibres run ; g, taste-bud ; n, sections of 

 nerve-bundles : a, serous gland. 



Tjud rests upon the corium of the mucous membrane, and receives a 

 branch of the glosso-pharyngeal nerve ; the apex is narrow and com- 

 municates with the cavity of the mouth by a small pore in the v super- 

 ficial epithelium (gustatory pore, fig. 187, j?). 



