[E RELATION OF THE DUCTLESS GLANDS 



igar, after undergoing appropriate simplification 

 in the digestive tract are stored in the liver in the 

 form of glycogen ; and that whenever the body needs 

 to expend energy, some of the glycogen is converted 

 into glucose, which in turn finds its way to the 

 muscles, where some may be resynthesized into 

 glycogen, but where it is ultimately oxidized OP 



GLUCOSE 



FIG. 2. 



THE EFFECT OF MOBILIZATION OF SUGAR IN THE LIVES. 



- = stimulation ; - - = inhibition 

 An arrow indicates the direction of action. 



''burned," yielding, as final products, carbon di- 

 oxide and water. All this is a very complicated 

 process. There must be a regulating or guiding 

 mechanism involved to establish order in the place 

 of chaos. We have seen how a large part of this 

 function is taken over by the pancreas, and we have 

 proved that it is the internal secretion of the pan- 

 creas that is responsible. We have seen, for ex- 

 ample, how the extirpation of the pancreas re- 

 moves a restraining hand from the liver, with the 



