296 



THE ALIMENTARY TRACT, ETC. 



Fig. 195. 



tomosis, from which three branches (3) f varying size unite at the 

 anterior extremity of the pancreas to form the common bile-duct 



(Ditctus choledoc Jiits, Uc], 

 The common bile-duct 

 runs through the whole 

 length of the pancreas, 

 receiving near its origin 

 additional hepatic ducts 

 (.Z^ 1 ) from the middle 

 lobe of the liver. In 

 this course the duct lies 

 either on the ventral 

 surface of the pancreas 

 or under a thin layer of 

 the glandular tissue ; it 

 receives the ducts of the 

 pancreas and leaves that 

 organ at its posterior 

 border as a round and 

 strong canal (Dc 1 }. The 

 duct courses in the 

 gastro - duodenal liga- 

 ment, and reaches the 

 dorsal surface of the 

 duodenum at a very 

 acute angle ; it then 

 pierces the wall ob- 

 liquely and terminates 

 with a slit-like or elon- 

 gated oval opening. 

 b. [Minute structure. 

 (i) The liver is com- 

 posed of various tissues : 

 it possesses a peritoneal 

 covering, a fibrous cover- 

 ing, which supplies tra- 

 beculae to support the 

 various other tissues, blood-vessels, hepatic cells or true liver paren- 

 chyma, and bile-canals. 



a. The peritoneal covering of the liver encloses the organ 

 almost completely, the only exceptions being where the various 



Dc a 



Du- 



The pancreas and bile-canals. The liver has been displaced 



towards the head. 

 Common bile-duct. 



Common bile-duct after leaving the pancreas. 

 Opening of the common bile-duct into the duodenum. 

 Cystic ducts. 

 Hepatic ducts. 

 Supplementary hepatic ducts from the middle lobe of 



the liver. 

 Duodenum. 

 Gall-bladder. 

 Left lobe of the liver. 

 Right lobe of the liver. 

 Middle lobe of the liver. 

 Fourth lobe of the liver. 

 Gastro-hepatic ligament. 

 Stomach. 

 Pancreas. 

 Pylorus. 

 Ducts of the pancreas. 



