DIGESTION. 



83 



the milk teeth are absorbed, and the latter are "shed." or 

 fall out, one after another (Fig. 18), to make room for the 

 permanent set. 



PIG. 18. SECTION OF THE JAWS. 

 1' 2' 3' 4 5'. The Milk Teeth ; 1" to 8", The Germs of the Permanent Set. 



8. There are thirty-two teeth in the permanent set, as 

 many being in one jaw as the other. Each half-jaw has 

 eight teeth, similarly shaped and arranged in the same 

 order : thus, two incisors, one canine, two bicuspids, and 

 three molars. The front teeth are small, sharp, and chisel- 

 edged, and are well adapted for cutting purposes; hence 

 their name incisors. The canines stand next, one on each 

 side of the jaw; these receive their name from their resem- 

 blance to the long, pointed tusks of the dog (Fig. 19). 



8,9. Number of teeth ? How distributed ? 



