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TEXTBOOK OF ZOOLOGY 



Thus we see the complexity of the performance of these secre- 

 tions in the body. When they are present in correct proportions, 

 the organism enjoys a smooth functioning of its physiological proc- 

 esses, regulated by the hormones. The malfunctioning of any one 

 endocrine organ results, however, in a disturbance of those processes 

 which it specifically regulates and usually of others which it influ- 

 ences in conjunction with its sister glands of internal secretions 

 or with other regulatory organs of the body. Each gland is called 

 upon, therefore, to function in full cooperation with the other glands 

 as well as to perform duties peculiar to itself. 



