LIVER. 



197 



latter are surrounded by the capillaries, for these run along 

 many surfaces of the cells. These capillaries join to form 

 interlobular bile ducts, which are lined with low cubical epithelial 

 cells possessing a refractile cuticular border. At the outside of 

 these there is a homogeneous membrana propria. The wall of 

 the large bile ducts consists of a single layer of cylindrical 

 epithelium and a connective-tissue capsule. 



FIG. loO. 



Transverse section of a lobule from a pig's liver, showing the vena cen trails in the centre, 

 and the interlobular connective tissue around the whole lobule. X 35. 



The interlobular connective tissue is, as we have said, a 

 continuation inward of the fibrous capsule of Glisson, which 

 consists of fibrous and elastic connective tissue. Only a very 

 little of this tissue enters the lobule itself. Here the framework 

 is made up of the so-called " Gitterfasern " of Oppel. These are 

 fine radially arranged fibrils surrounding the blood capillaries, 

 and are entirely identical with the true reticulum described 

 by Mall. 



The liver contains blood-vessels from two sources (Fig. 156). 

 The arterial blood from the hepatic artery forms only a small part 



