THE DIGESTIVE SYSTEM 



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FIG. 79. Diagram showing the permanent teeth : a, Central incisors; &, 

 lateral incisors ; c, canines ; d, first bicuspids ; <?, second bicuspids ; f t first 

 molars; g, second molars ; h, third molars (J. P. C. Griffith). 



FIG. 80. The palate and superior dental arch (right side) : i, Median 

 incisors; 2, lateral incisors; 3, canine; 4, first bicuspid; 5, second bicus- 

 pids; 6, first molar; 7, second molar; 8, wisdom tooth ; 9, mucous mem- 

 brane of the hard palate continuous, behind, with that of the soft palate; 

 10, the anteroposterior raphe of palate; n, pits on each side of the raphe 

 perforated with the orifices of glands ; 12, anterior rugosities of the mucous 

 membrane (after Testut). 



In the second stage, which is entirely reflex, the palate 

 is made tense and directed upward and backward by the 

 11 



