1328 



duct lies to the right, the hepatic artery to the left, and the portal vein behind and between the 

 other two. They enter the transverse fissure in the above-described order, but in that fissure 

 undergo rearrangement, the duct being in front, the artery in the middle, and the vein behind. 

 The artery, the vein, and the duct divide into a right and left branch and several smaller branches. 

 and within the organ the vessels from the three sources accompany each other and divide n.t. the 



FIG. 1069. Schematic section of the liver. The fibrous tunic is shown in black and the capsule of Glisson in red. 



same points; so each branch of the portal vein is accompanied by a branch of the hepatic artery 

 and of the duct. They are enveloped in a loose areolar tissue, the capsule of Glisson (Fig. 

 1069), which accompanies the vessels in their course through the portal canals in the interior of 

 the organ. 



The hepatic veins (Fig. 472) convey the blood from the liver. They commence in the sub- 

 stance of the liver in the capillary terminations of the portal vein and hepatic artery; these 

 tributaries, gradually uniting, usually form three veins, which converge toward the posterior 

 gnrfapp nf the liver and open into the portion of the inferior vena cava situated in the groove at 

 the back part of this organ. Of these three veins, one from the right and another from the left 

 lobe open obliquely into the inferior vena cava, that from the middle of the organ and lobus 

 Spigelii having a straight course. 



COMMON DUCT 



FORAMEN OF 

 WINSLOW 



DUODENUM 



FIG. 1070. The relations of the vessels as they pass into the transverse fissure of the liver. (Poirier and Charpy.) 



The hepatic veins have very little cellular investment; what there is binds their parietes 

 closely to the walls of the canals through which they run; so that, on section of the organ, these 

 veins remain widely open and solitary (Fig. 1072), and may be easily distinguished from the 

 branches of the portal vein (Fig. 1073), which are more or less collapsed, and always accom- 

 panied by an artery and duct; the hepatic veins are destitute of valves. 



