DIGESTION 



171 



basally a necessary process of protoplasm either directly or indirectly, 

 and hence is universal in the animal kingdom. It is, moreover, a process 

 common enough, even as animals perform it, in the vegetable kingdom. 



FIG. 76 



DIGEST/ON 

 Q Protein 

 O Albuminoids 

 O Starch 

 (D <5ugar 



Coagulated ' case/nogen 



