NUTRITION PROPER. , 2q 



it contains also living nucleated cells like the white cor- 

 puscles of the blood, contributed to it by the glands. 

 In a word, before passing, it is chyle j after passing, it is 



Fig. 210. — Diagram showing the distribution of the blood through the liver. 

 The arrows show the direction of the current. 



at least partly converted into blood. The change is 

 completed in the blood itself. 



The last stage — i. e., the actual assirnilatio?i into tis- 

 sue — will be spoken of in connection with the circulation. 



MODIFICATION OF THE PROCESS OF INTESTINAL 

 DIGESTION IN VERTEBRATES. 



There is little to be said on this subject, because the 

 modification of the process, as already given, is unimpor- 

 tant. The whole process of digestion — mouth digestion, 

 stomach digestion, and intestinal digestion — is simpler in 

 carnivores and more elaborate in herbivores. Man in 



