LIVER. 



Fig. 405, 



[ 474 ] 



Magnified about 3 diameters. 



Portion of the liver of a pig, nith divided branches of 

 the vena cava ; the lobules are visible upon the divided 

 surfaces: a, large vein, no orifices of t lie intralobular 

 veins being visible ; fi, branches of the same, with dis- 

 tinct orifices of the intralobular veins, and the bases of 

 the lobules seen through their walls. 



panied by branches of the hepatic duct and 

 ramilications of the hepatic artery, the whole 

 being surrounded by connective tissue pro- 

 longed from Glisson's capsule. Hence, in 

 a section of the uninjected liver, 

 those branches of the vena portge 

 and of the vena cava which ai-e 

 visible to the naked eye are readily 

 distinguishable from each other by 

 the orifices of the former collapsing, 

 whilst those of the latter are kept 

 open by their close contact with the 

 lobules. 



In the centre of each lobiile arises 

 a branch of the vena cava, by the 

 imion of numerous smaller branches 

 (coloured yellow in PI. 39. fig. 33), 

 which take their origin in the ca- 

 pillary plexus of the lobule ; these 

 central branches form the intralobu- 

 lar veins. 



The capillaries of the lobules form 

 a close and elegant plexus between 

 the branches of the inter- and intra- 

 lobular veins, the rest of the lobules 

 being filled up with the secreting 

 cells. 



LIVER. 



Fig 406. 



Magnified about 4 diameters. 



Section of the liver of a pig through a branch of the 

 vena portce, w ith accompanying branches of the hepatic 

 artery and duct. On the right are seen two branches 

 of the vena portse giving ofi the interlobular veins. 



The branches of the biliary ducts accom- 

 pany those of the vena portse as far as the 

 interlobular spaces, where they again branch 

 off, forming a network of extremely slender 

 tubes or biliarv capillaries, which surround 

 individually the liver-cells (fig. 408). The 

 biliary ducts consist of an outer coat of 

 connective tissue, the bundles of fibres of 



Fig. 407. 



1 



Section 

 course of 

 others 



Magnified 35 diameters. 



of a portion of the liver of a rabbit, showing the entire 

 one of the intralobular veins, the roots only of the 



