300 



THE ALIMENTARY TRACT, ETC. 



199. 



a. A serous coat of peritoneal endothelium. 



(3. A muscular coat, containing unstriated muscle-fibres and con- 

 nective-tissue. 



y. A sub-mucous coat of areolar-tissue. 



5. An internal lining 

 of columnar epithelium. 



6. The walls of the 

 gall-bladder are richly 

 supplied with blood-ves- 

 sels from the cystic ar- 

 teries (p. 233) ; these 

 form a close network in 

 the submucous coat. 



The muscular and 

 submucous coats also 

 possess a rich nervous 

 plexus, which contains 

 ganglia and resembles 

 Auerbach's plexus of the 

 intestine (Popoff, Ger- 

 lach).] 



B. The Pancreas (Fig. 

 199 P). 



a. General descrip- 

 tion. The pancreas is 

 a flattened, light yel- 

 lowish - brown organ, 

 placed in the loop of the 

 duodenum between this 

 latter and the stomach. 

 The whole organ is within 

 the gastro-duodenal liga- 

 ment, and is attached to 

 the liver; hence it is 

 little influenced by 

 changes in the amount 

 of distension of the 

 stomach or intestine. 



The organ may be 

 completely exposed by either of two methods : in the former, the 

 liver, stomach, and duodenum are drawn towards the head and 



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

 towards the head. 



DC 



Hey 

 Dh 



L3 



Lhp 



M 



P 



PI 



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. 



Ducte of the pancreas. 

 Pylorus. 



