348 



ABDOMEN 



FIG. 158. The Papilla 

 the upper end of the 

 (Birmingham.) 



Hood -like plica 

 circularis 



Papilla duodeni 

 Common opening 

 of bile and pan- 

 creatic ducts 



- Plica 

 longitudinalis 



Duodeni, situated at 

 Plica Longitudinalis. 



at the 

 papilla 

 papilla 



the duodenum upon its posterior and medial aspect, and 



terminate in its wall 

 in a dilatation, the 

 ampulla of Vater^ 

 which opens into 

 the cavity of the 

 duodenum 

 apex of a 

 called the 

 duodeni. 



The accessory duct 

 {Santorini} is small, 

 and arises in the 

 lower part of the 

 head of the gland. 

 It usually has an 

 independent open- 

 ing into the duo- 

 denum, above and anterior to the opening of the main duct. 



It may communicate with the main duct. 

 The dissector is 



now in a position to 



study the biliary ducts 



and the portal vein. 

 Ductus Biliferi. 



The ducts which 



carry the bile, 



secreted by the 



liver, from the liver 



and the gall-bladder 



to the duodenum are 



(i) the right and 



left hepatic ducts, 



(2) the common 



hepatic duct, (3) 



the cystic duct, and 



(4) the bile-duct. 



Bile flows only in one 



direction through the 



hepatic ducts and the 



bile-duct, that is, towards the duodenum; but through the cystic 



duct it flows sometimes to and sometimes from the gall-bladder. 



Plica; 



longitudinalis\ 

 duodeni 



Papilla 

 duodeni 



FIG. 159. Pars Descendens Duodeni, opened 

 from the right side. Showing the duodenal 

 papilla at the upper end of the plica longi- 

 tudinalis under a hood-like plica circularis. 



