424 



PHYSIOLOGY AND MORPHOLOGY OF ANIMALS. 



3 Animals 



It is a reservoir for C0 2 until eliminated by the lungs. 

 It is a reservoir for food, which is drawn upon and re- 

 supplied by digestion and absorption. It is a reservoir 

 for waste tissue until it is finally prepared for combus- 

 tion. In a word, it is a reservoir both for material and 

 for force. It acts like a fly wheel in the animal ma- 

 chine. 



7. The Relation of Plants to Animals in regard 

 to the Creation of Animal Force. — It is seen from 

 the diagram (Fig. 294) that the anabolic lift, deter- 

 mined by the kat- 

 -—=-.- - - abolic descent, be- 



gins more than half- 

 way up the scale of 

 existence. Other- 

 wise there could 

 be generated only 

 force enough to 

 make the lift and 

 maintain the tis- 

 sues, and none 

 would be left over 

 for activities of all 

 kinds. The ques- 

 tion then occurs, 

 How does matter 

 attain this half- 

 way plane ? The 

 answer is : It is 

 raised to that plane 

 by sunlight acting on the green leaves of plants. Ani- 

 mals must feed on organic matter, but they have no 

 power to make it. It is prepared ready for them by 

 plants. The reason is, animals are wholly dependent on 

 katabolic processes within themselves for the generation 



1 Minerals 



FIG. 295.- 



-Diagram to show the forces of circula- 

 tion of organic matter. 



