THE CAUSES OF DEATH 



133 



of th.e endocrinal system, including the thyroid gland, 

 suprarenal glands, etc., do not become significant until 

 middle life in the case of the male, as shown in Figure 36, 



t 



i 





£NDOCRINAL SYSTEM 



Fio. 36. — Diagram showing the specific death rates at each age from breakdown of the 

 endocrinal system (Group IX). 



although in the female the curve begins to rise from pu- 

 berty on. The specific rates at all ages, of course, are 

 extremely small, practically never rising to more than 



