250 



BOVINE PATHOLOGY. 



They decrease in length towards each orifice ; only the 

 four or five largest extend the full length of the organ ; 



Pig. 47. — Omasum and abomasum, opened lonoritudinally. 5. Rumino-retl- 

 cular opening. (Simonds.) 



between them lie the smallei' ones. The lesser curvature 

 bears no folds ; papillge occur over the surface of the mem- 

 brane, some conical, others clavate. 



The Abomasum or True Digestive Stomach lies to the 

 right of the antero-inferior and central parts of the 

 rumen, extending from below and to the left of the 

 omasum, obliquely upwards and backwards. Thus, it 

 has a lesser curvature superiorly placed, and a greater 

 postero-inferiorly. It commences at a rather wide open- 

 ing from the omasum, and terminates at the pylorus. 

 The mucous membrane presents folds, which vary in their 

 direction in different parts. It is villous and bears gastric 

 follicles, whereby the succus gastricus is secreted. The 



