THE DENTAL TISSUES. 



tooth, but pulp and calcified tissue are quite inextricably 

 mixed up. 



And though there are numerous large channels, often 

 much larger than those of vaso-dentine, they are less regular, 



FIG. 47 



do not in their arrangement suggest the idea of capillary 

 loops, and in a fresh tooth contain masses of pulp-structure 

 as well as blood-vessels. 



The Pike's tooth affords a good example of osteo-dentine. 

 Its surface is formed of a layer of fine tubed tissue, almost 



0) Tooth of Common Pike, 

 inner mass of osteo-dentine. 



a, Outer layer of fine tubed dentine ; 



