138 



NORMAL HISTOLOGY. 



continuous with the stratified epithelium covering the gums and 

 lining the buccal cavity. 



Fig. llii. 



... 











■SS^ 5 ^^ IPSfc^S^e^S^ i. . $S ! 



Twocircumvallatepapillfe ; rabbit. (Ranvier.) p, p', fibrous tissue extending into the papilla ; 

 p', that containing the nerves passing to the taste-buds ; g, taste-buds ; v, small vein ; n, n, 

 nerves ; a, acini of a serous gland. 



The upper surface and the edges of the tongue are covered with 

 papillae, some of which are pointed (filiform papillae), others rounded 



Fig. 117. 



Portion of a section of a mucous gland in the human tongue. (Benda and Guenther's Atlas.) 

 a, duct; 6, acinus opening into a duet-radicle; c, acinus lined with mucigenous cells, sim- 

 ilar to b. Between and below a and c. cross-section of a small artery, recognizable by the 

 elongated nuclei of its muscular coat. 



(fungiform papillae), and still others surrounded by a sulcus (cir- 

 cumvallate papillae) (Figs. 114-1 1G). Within the epithelium lining 



