XXIII J PANCREAS AND LIVER 183 



size ; the branches of the hepatic artery, small but 

 with comparatively thick walls; and the small bile- 

 ducts, with cubical or columnar epithelium and distinct 

 lumina. The three vessels run together. 



The hepatic cells radiating more or less obviously 

 from the hepatic veinlet. 



b. Observe with a high power, the polygonal 

 hepatic cells with granular cell substance and one or 

 two spheroidal nuclei, and the epithelium of the 

 bile-ducts. 



3. Section of liver, injected from the portal vein 

 with Berlin blue or with carmine-gelatine. Mount 

 in balsam. Observe, comparing with the uninjected 

 specimens, 



The hepatic veinlet, seen according to the plane in 

 which the lobule is cut, either as a more or less circular 

 section, or as a short veinlet passing from the centre of 

 the lobule to the sub-lobular vein. 



The portal veinlet running on the outside of the 

 lobule, and giving branches to more than one lobule. 



The radial capillary network between the portal and 

 hepatic veinlets united by numerous cross branches; 

 commonly there is only one row of cells between the 

 radial capillaries. 



4. Section of rabbit's liver containing glycogen 

 (alcohol, cut frozen). a. Place in a drop of iodine 

 solution, and mount in glycerine containing a little 

 iodine, observe the red-brown stain of glycogen in 

 the cells. 



6. Stain a section with ha3matoxylin and eosin; 



