478 



DIGESTIVE SYSTEM OF THE PIG 



palate, i. e., it is nearly horizontal. It extends to the middle of the oral surface 

 of the epiglottis. It has in many cases a small median prolongation termed the 

 uvula. The oral surface presents a median furrow, on either side of which is an 

 oval raised area, marked by numerous crypts; these elevations are the tonsils. 

 Tonsillar tissue also occurs in the lateral walls of the isthmus faucium and the root 

 of the tongue. 



The tongue is long and narrow and the apex is thin. Two or three vallate 



t^J?;-^ 



Fig. 411. — Hard Palate of Young Pig. 



1, Papilla incisiva; 2, openings of ductus in- 

 cisivi; 3, raph6 of palate; a, incisor teeth; b, canine 

 tooth; c, premolar teeth; d, molar teeth. 



Fig. 412. — Tongue of Pig. 

 1, Apex; 2, dorsum; 3, root; a, orifices of ducts of 

 lingual glands; b, papillae of root; c, vallate papilla (not 

 really so distinct as in figure) ; d, foliate papilla; e, fungi- 

 form papillae ; /, epiglottis (pulled back) ; g, median glosso- 

 epiglottic fold. (EUenberger-Baum, Anat. d. Haustiere.) 



papillae are present. The fungiform papillae are small and are most numerous 

 laterally. The filiform papillae are soft and very small. On the root there are 

 soft, long, pointed papillae, directed backward. Foliate papillae are also present. 



There is a well-marked median glosso-epiglottic fold, on either side of which is 

 a depression (Vallecula epiglottica) . The frenum linguae is double. 



The dental f ormulai of the pig is : 



/ 3 1 4 3\ 



!( I-C-P-M- I 



V 3 1 4 3/ 



= 44 



' Several figures in the osteology also illustrate the teeth. 



