VISCERAL ANATOMY. 



121 



Teeth. 



They are passive agents in mastication, and are in number 40 

 in the male, 36 in the female — viz., in each jaw 6 incisors, 12 

 molars, in male two canines in addition. 



Parts. 



Crown, fang, neck and dental pulp. 



Structure. 



Ivory or dentine, outside of pulp cavity. 



Cement, covering the dentine. 



Enamel, covers free portion of tooth, formed of small rods. 



Incisors. 



Are pyramidal, flattened from before, backward, with a single 



Fig. 18. 



Profile of the upper teeth of the horse, more especially intended to show 



THE molars; the fangs have been exposed. 



a. Molar teeth; b. Supplementary molar; c, Tusk; d. Incisors. 



fang ; they are called in each half of a jaw, the pincer, interme- 

 diate and lateral from within outward. 



Canines, fangs or tusks. 



Found only in male, between the incisors and molars, the 

 space between them and the latter is called the bar. They are 

 pointed, have a single fang and grow but once. 



Molars. 



The crowns are flattened and undulated, and communicate 

 with the interior of the fangs, which are at first hollow, then filled 

 with dentine. 



The fangs are three in number ; in the terminal molars, both 

 9 



