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A MANUAL OF VETERINARY PHYSIOLOGY 



horse is peculiar ; one portion of it, practically half, is a continua- 

 tion of the membrane of the oesophagus ; this ends abruptly, and 

 is succeeded by the villous coat, which extends to the pylorus. 

 It is in this latter coat that a true digestive juice is secreted, 

 though not from the entire surface, for on examining the villous 

 membrane it is found to differ greatly in appearance, the fundus 

 being channelled, furrowed, and velvety, whilst the pyloric 

 portion is smooth. It is in the fundus only where true gastric 

 juice — viz., pepsin and acid — is secreted ; in the smooth pyloric 

 mucous membrane only pepsin is formed. The area of the 

 fundus-secreting surface is about I square foot. Fig. 62 shows 



PYL. 



CARD. 



L.S. 



CUT. 



BOU. *" 



FUN D. 



Fig. 62. — Longitudinal Section of the Stomach of the Horse. 



card., Cardia ; pyl., pylorus ; l.s., left sac ; r.s., right sac ; cut., cuticular coat ; 

 vil., villous coat ; bou., boundary line between the cuticular and villous 

 portions ; fund., fundus of the stomach. The dotted surface indicates the 

 area for the secretion of gastric juice. 



the relative position of the various parts of the mucous membrane 

 of the stomach of the horse ; the drawing accurately indicates the 

 shape of the stomach, the position of the inlet and outlet, and 

 the direction and position of the various areas. In Fig. 63, after 

 Ellenberg and Baum, is indicated the position of the organ in 

 the living animal. 



There is a want of agreement in the matter of stomach nomen- 

 clature. The human physiologist describes the fundus of the 

 stomach as being close to the cardia, whereas we have spoken of 

 it as being at the bottom or on the floor of the stomach, as if it 

 were in the position the name ' fundus ' would assign it.* In 



* The fundus of an organ is the rounded base of a viscus ending in a 

 neck, and having an aperture. It is the bottom of anything. 



