PAPILLA OF THE TONGUE. 



117 



tinuous with the connective tissue investing the muscle-fas- 

 ciculi in the interior. The glands of the tongue are of two 

 kinds, mucous and serous. 



The mucous glands are small racemose glands, occurring in 

 considerable numbers, and situated in the submucosa and 

 between the muscular fasciculi. 



The serous glands, or glands of Ebner, are small racemose 

 glands occurring in the vicinity of the circumvallate papillae 

 and discharging their watery secretion into the furrows sur- 

 rounding these papillae. 



Nodules and masses of lymphoid tissue are abundant, under- 



FIG. 48. 



FIG. 49. 



Papilhe uf human tongue (Heitzmann). 



Fig. 48. Filiform papillae. 



Fig. 49. Fungiform papilla. E, epithelium ; C, tunica propria, showing capillaries ; 

 L, lymphoid tissue ; .)f, muscle. 



neath the epithelium, at the base of the tongue, forming the 

 so-called lingual tonsil. The tongue is amply supplied with 

 blood- and lymph vessels and nerves of motion, general sensa- 

 tion, and special taste-sense. 



Papillae of the tongue (Figs. 48, 49, 50) : On the upper sur- 



