[ 474 ] 



Magnified about 3 diameters. 



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

 the vena cava ; the lobules are visible upon the divided 

 surfaces : a, large vein, no oriilces of the intralobular 

 veins being visible ; b, 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 

 ramifications 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 portse 

 and of the vena cava which are 

 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 lobule arises 

 a branch of the vena cava, by the 

 union of numerous smaller branches 

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

 which take their origin in the ca- 

 pillary plexus of the lobule j 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. 



Magnified about 4 diameters. 



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

 vena portse, with accompanying branches of the hepatic 

 artery and duct. On the right are seen two branches 

 of the vena portae giving off the interlobular veina. 



The branches of the biliary ducts accom- 

 pany those of the vena portsB as far as the 

 interlobular spaces, where they again branch 

 off, forming a network of extremely slender 

 tubes or biliary 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. 



Magnified 35 diameters. 



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

 course of one of the intralobular veins, the roots only of the 

 others. 



