206 ELEMENTARY PHYSIOLOGY. [XIX. 



7. Between the lobules the thin-walled 

 portal or interlobular veinlets, some 

 of them of considerable size; and the 

 branches of the hepatic artery, small 

 but with comparatively thick walls. 



& Between the lobules may also be seen 

 small bile-ducts, with cubical or colum- 

 nar epithelium and distinct lumina. 



e. The hepatic cells radiating more or 

 less obviously from the hepatic veinlet. 



6. Observe with a high power 



a. The polygonal outline of the hepatic 

 cells; the cell-substance is granular 

 and contains one or more spheroidal 

 nuclei 



/3. The capillary blood-vessels, running out 

 from the centre of the lobule between 

 the rows of cells, and joining with one 

 another at intervals by cross branches; 

 they are usually traceable by their con- 

 taining blood corpuscles. 



7. The bile-ducts, their columnar epithelium 

 with distinct nuclei. In some of the sec- 

 tions the epithelium may be seen to 

 become shorter and more cubical as the 

 duct approaches a lobule. The duct it- 

 self often appears to end abruptly at the 

 margin of the lobule. 



