DIGESTION. s 1 



lowing of food caused a great increase of flow of gastric juice. If, 

 now, the pulmonary and abdominal vagi are divided on both sides, 

 then sham feeding causes no flow of gastric juice. These experiments 

 show that the gastric glands receive their normal impulses to activity 

 by means of nerve-fibers in the vagi. Pawlow believes that secretory 

 nerves of the stomach run in the vagi. Pawlow also excited the vagi 

 after a previous section for some days and obtained an increase of 



Pylorus 



II. 



Fig. 18. Dog's Stomach. ( PAWLOW.) 



I. A-B, Line of incision. C, Flap for forming stomach-pouch of Pawlow. 

 II. T 7 , Cavity of large stomach. 8, Pawlow's pouch, or small stomach. A, A, 

 Abdominal wall. 



gastric secretion. Atropine paralyzes the secretory nerves of the 

 stomach. By the secretory fibers we mean those, according to Heid- 

 enheim, which stir up the secretion of water and inorganic salts of 

 the gastric juice. The trophic fibers are concerned in the secretion of 

 the ferment of the gastric juice. Sooner or later after the taking of 

 food the influence of the reflex excitant comes into play, while the 



