THE PANCREAS 



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granular and less easily stained with hematoxylin, and their nuclei are small 

 and stain deeply. The collections of cells vary in size and shape. The 

 special form of nerve terminations, called Pacinian corpuscles, are often 

 found in the pancreas. The secretion of the pancreas has been obtained for 

 purposes of experiment from the lower animals and from man in at least 

 one case. A pancreatic fistula is established in the dog by opening the 



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FIG. 267. Duct with Laterals to the Alveoli. Silver method of Golgi (E. Muller). A, Duct 

 vrith branches; m, between the cells. B, Laterals more strongly magnified. 



abdomen and exposing the duct of the gland which is then made to com- 

 municate with the exterior. In Pawlow's method a circular bit of the intes- 

 tinal mucous membrane around the mouth of the duct in the intestine is 

 brought to the surface and stitched into the wound. The secretion is then 

 easily collected into a vessel suspended under the opening. 



The Pancreatic Juice. Pancreatic juice is colorless, transparent, 

 slightly viscid, and alkaline in reaction. It varies in specific gravity from 

 1010 to 1030, according as it is obtained from a permanent fistula then more 



