XXVI.] 



LIVER. 



28; 



P.V.). Branches of all three structures always run together in the 

 portal canals, and are surrounded by Glisson's capsule. 



(c.) Capillaries for the most part empty running from without 

 inwards in each lobule. Radiating from the hepatic veinlet columns 

 of liver-cells, forming a network of secretory cells intertwining with 

 the capillary plexus within the lobule. 



(d.) (H) The columns of hepatic cells radiating from the hepatic 

 veinlet, composed of polygonal or cubical cells, with granular con- 

 tents and an excentrically-placed spherical nucleus. At the outer 

 part of the lobule the network of cells is more polygonal, correspond- 

 ing to the arrangement of the capillaries. Between the columns of 

 cells, capillaries, sometimes with a few blood-corpuscles. The 

 however, are not as distended as normal. Transverse 



FIG. 276. Columns of Liver-Cells 

 from a Starving Dog. 



FIG. 277. T.S. Portal Canal with Glisson's Capsule 

 enclosing Portal Vein (P.V.), Bile-duct (B.D.), and 

 Hepatic Artery (H.A.). The slit is a lymphatic. 

 C. Capillaries. I.e. Liver-cells. 



branches running between adjoining capillaries, and the whole 

 interwoven with the cellular network. 



In a hsematoxylin-stained section, note that the nuclei of the 

 liver-cells are stained to a less degree than the other nuclei. The 

 nuclei of the cells of the connective-tissue, bile-ducts, and capillaries 

 are more deeply stained. In the picro-lithium preparations, the 

 cells are yellowish with nuclei red, but of different shades of the 

 same. 



With the low power find a portal canal with its contents ; fix 

 them under the microscope and examine with (H). 



(e.) One or more sections of interlobular bile-ducts, lined by a 

 single layer of shorter or taller columnar cells; outside them con- 

 nective tissue, disposed circularly and continuous with that of 

 Glisson's capsule (fig. 277). A section of a branch of the hepatic 

 artery and the largest opening of all of the portal vein. Some 

 slits may be seen in Glisson's capsule ; they are lymphatics. 



