THE SECRETING GLANDS 



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an internal secretion which regulates the production 

 of glycogen by the liver, thus possessing both an 

 internal and external secretory function. 



FIG. 113 

 Interlobular duct. 



Interlobular 

 connective 

 tissue. 



Capillary. 



Area of 

 Langerhans. 



Intralobular 

 duct. 



Section of human pancreas, showing pancreatic islands. (Radasch.) 



Ductless Glands. The ductless glands of the body 

 are: 



Thyroid. 

 Parathyroids. 

 Spleen. 

 Carotid. 



Thymus. 



Suprarenal capsules. 

 Pituitary body. 

 Coccygeal. 



The above glands aid in the nutrition of the whole 

 body as well as in that of individual organs by means 

 of an internal secretion which is absorbed by the blood 

 and lymph streams. This material, derived from the 



