CH. V.] 



STRUCTURE OF A TOOTH 



53 



cells called odontoblasts, which are elongated columnar cells with a 

 large nucleus at the tapering ends farthest from the dentine. 



FIG. 64. A, longitudinal section of a human molar tooth ; c, cement ; d, dentine ; e, enamel ; v, pulp- 

 cavity. (Owen.) 

 B, transverse section. The letters indicate the same as in A. 



The blood-vessels and nerves enter the pulp through a small 

 opening at the apical extremity of each root. The nerves terminate 



Enamel 



Dentine. 



Cement 



Lower jaw-bone 



Cement. 



FIG. 65. Premolar tooth of cat in situ. 



