330 THE ANATOMY OF THE HOBSE. 



The Pyloeic Orifice is much larger, but capable of being completely 

 closed by the pyloric ring of muscular fibres. 



Fig. 39. 



Stomach, everted aijd inflated. 



1. Left (cardiac) sac with its cnticukir mucous lining ; 2. Right (pyloric) sac with its villous 

 mucous lining ; 3. Cuticular ridge ; 4.- Termination of oesophagus ; 5. Initial part of duodenum ; 

 6. Pyloric ring. 



In the interior of the duodenum, about six inches from the pylorus, 

 the openings of the bile and pancreatic ducts will be found. The orifices 

 of the bile duct and duct of Wirsung are placed together on the con- 

 cave side of the bowel, and are surrounded in common by a ring-like 

 valvular fold of mucous membrane. The opening of the accessory pan- 

 creatic duct is placed opposite to these. 



STRUCTURE OF THE LIVER. 



Lay the organ with its diaphragmatic surface downwards. Find the 

 portal vein, hepatic artery, and bile duct, at the portal fissure, and trace 

 them for a little distance into the liver. Invert the organ, and observe 

 the course of the anterior vena cava in the anterior fissure, and the mouths 

 of the hepatic veins which there discharge themselves into the cava. 



Tunics or Capsules of the liver. These are two in number : 1. A 

 peritoneal coat, giving the free surface of the organ its smooth and 

 glistening characters. 2. A tunica propria, or fibrous coat, placed beneath 

 the preceding. All over the surface of the liver it sends inwards delicate 

 processes that join the interlobular connective-tissue, and at the portal 



