THE RABBIT. 303 



197. The common bile-duct (c.b.d\ a delicate trans- 

 parent tube containing greenish bile, entering the duodenum 

 just beyond the pylorus, and receiving hepatic ducts 

 from the various lobes of the liver and a cystic duct from 

 the gall bladder. 



Calling the various hepatic ducts by the same names as the lobes from 

 which they spring, the arrangement of the whole series of biliary ducts 

 is as follows : The cystic duct (cy.d) unites with the right central 

 duct to form a right bile-duct : the left central and left lateral 

 ducts similarly unite to form a left bile-duct (h.d] : the right and 

 left bile-ducts unite to form the common bile-duct (c.b.d), which, 

 about half way between its commencement and its termination in the 

 duodenum, receives the posterior bile-duct formed by the union of 

 caudate and Spigelian ducts. They are best demonstrated by 

 injection from the duodenal aperture. 



198. The branches of the cceliac artery ( 182) : shortly after its origin 

 from the aorta it sends off to the left the splenic artery (sp.a), which 

 passes to the dorsal side of the cardiac division of the stomach, supply- 

 ing the latter as well as the spleen : soon after giving off the splenic 

 artery the coeliac divides into three : of these the middle one, which 

 continues the direction of the coeliac, is the hepatic artery (h.a) ; it 

 sends branches to the lesser curvature of the stomach, and then turns 

 forwards and sends a twig to each lobe of the liver, and a cystic 

 artery (cy.d) to the gall bladder : coining off to the right of the hepatic 

 is the duodenal artery (du.a), which supplies the pylorus and the 

 proximal part of the duodenum : coming off to the left of the hepatic 

 is the gastric artery (g.a), by which the main part of the stomach is 

 supplied. 



199. The portal vein (^.r), a large, thin-walled vessel, 

 usually gorged with blood, situated dorsal to (beneath in the 

 present position of the parts) the artery and duct. Anteriorly 

 it passes into and breaks up in the liver, sending a branch to 

 each of the lobes ; posteriorly it is constituted by the mesen- 

 teric vein ( 193, m.v) towards the animal's right side, and the 

 lieno-gastric vein (l.g.v), which brings the blood from the 

 stomach and spleen towards the left. 



200. The ramifications of the branches of the cceliac 



