384 HUMAN PHYSIOLOGY 



important elements of training as well as of interest. 

 The conclusion is that emotion should not be excluded, 

 even though that were possible, but that it should be 

 given reasonable expression made a motive for action. 

 When we work off our anger or express our happiness in 

 deeds we are true to our remote biologic inheritance. 



Other Organs of Internal Secretion. One of these 

 which has claimed a good deal of attention recently is 

 the hypophysis. This is a small but compound structure 

 united by a stalk to the under surface of the brain. It is 

 lodged in a hollow of the sphenoid bone. The removal of 

 an organ so situated requires a severe operation, but it 

 has been accomplished many times. The loss of the 

 entire hypophysis is fatal after a short interval. There is 

 reason to think that it is a producer of hormones. When 

 it is diseased development is perverted, the resulting 

 abnormalities being mainly in the shape of the bones. 



When one looks at the pictures which have been made 

 of persons with disease of the hypophysis or the thyroid 

 one is inclined to think that a great many individuals 

 show in slight degree the departures from the normal 

 which are carried to an extreme in these selected cases. 

 We constantly see faces which are strangely moulded 

 and which do not seem to register the true character and 

 intelligence of the man or woman. The underlying 

 condition may well be an excess or a lack of some inter- 

 nal secretion. 



The Reproductive Glands. We have seen that the 

 same organ may send products to the exterior and to the 

 circulation. This is true of the pancreas. While it 

 prepares a valuable digestive juice it is also making a 

 contribution to the blood. We find a corresponding state 

 of things to hold for the testes and the ovaries. The 

 unique function of these organs is to detach the germ-cells 

 which shall originate a new generation, but they are not 

 without influence upon the organisms which bear them. 



Removal of the reproductive glands from young 

 animals profoundly modifies the course of their de- 



