ANABOLISM AND KATABOLISM 39 



ruption (katabolism), the other a winding up or construc- 

 tion (anaboUsm). 



All physiologists are agreed that in life there is a twofold 

 process of waste and repair, of discharge and restitution, of 

 activity and recuperative rest. But there is no certainty as 

 to the precise nature of this twofold process. 



