PAPILLJE OF THE TONGUE. 



551 



one allied to that of touch, rather than of taste ; the latter 

 sense being probably seated especially in the other two va- 

 rieties of papillae, the circumvallate and the fungiform. 



FIG. 205. 



ft 7, A c' a 



A. Vertical section near the middle of the dorsal surface of the tongue : a, a. 

 Fungiform papillae. 6. Filiform papillae, with their hair-like processes, c. Similar 

 ones deprived of their epithelium, magnified 2 diameters. 



B. Filiform compound papillae: a. Artery, v. Vein. c. Capillary loops of the 

 secondary papillae, b. Line of basement-membrane, d. Secondary papillae, deprived 

 of e, e, the epithelium. /. Hair-like processes of epithelium capping the simple 

 papillae, magnified 25 diameters, g. Separated nucleated particles of epithelium, 

 magnified 800 diameters. 



1, 2. Hairs found on the surface of the tongue. 3, 4, 5. Ends of hair-like epithelial 

 processes, showing varieties in the imbricated arrangement of the particles, but in 

 all a coalescence of the particles towards the point. 5 incloses a soft hair, magnified 

 160 diameters. (Todd and Bowman.) 



The epithelium of the tongue is of the squamous or tessel- 

 lated kind (p. 34). It covers every part of the surface ; but 



