METABOLISM 227 



istics to appear. This effect is considered to be due to lack of 

 substances poured out into the blood stream from these organs. 



The anterior lobe of the pituitary body is known to have a 

 marked influence on growth. If it is removed from a young 

 animal, the animal fails to grow, and retains its infant char- 

 acteristics such as immature intelligence, infantile sex organs, 

 etc. If there is an excessive development of this portion of the 

 hypophysis, gigantism results. The posterior lobe seems to have 

 no such function. The only symptoms reported after its removal 

 are an increased sexual desire, and an increased flow of urine. 



The thymus and pineal glands probably have functions in 

 connection with general metabolism, but these functions as yet 

 are obscure. 



