DIGESTIVE GLANDS. 



225 



In the center of each lobule is a blood-vessel known 

 as the intralobular vein, while the small veins be- 

 tween the lobules are called the interlobular veins. 

 These two sets of veins are connected by irregular 

 blood capillaries that radiate from the periphery of 

 the lobule to its center. They are typical capillaries 

 whose walls consist of but a single layer of flattened 



3^7^- Intralobular 

 vein. 



Fig. 1 70. Human bile capillaries. The capillaries of one lobule are 

 seen to anastomose with those of the adjoining lobule (below, in the 

 figure) (chrome-silver method) (Bohm and Davidoff). 



endothelial cells. The blood in the portal vein 

 passes to the interlobular veins, then through the 

 capillaries to the intralobular vein. The latter 

 opens into sublobular veins which unite to form the 

 hepatic veins, and these in turn open into the vena 

 cava just below the diaphragm. The arterial blood 

 of the hepatic artery supplies the connective tissues, 

 15 



