THE TEETH OF THE HORSE 



343 



is maintained. The root beoins to grow at four or five years of age, and is com- 

 plete at twelve to fourteen, although the deposition of cement may continue 

 indefinitely. 



The upper or maxillary teeth are embedded in the alveolar processes of the 



maxilla. The exposed parts of the crowns are normally in close contact, forming a 

 continuous row which is slightly curved, with the convexity toward the cheek. 

 The embedded parts diverge in "the manner shown in the annexed figures (Figs. 

 251, 253). Thus the long axis of the first is directed upward and a little forward, 



