NORMAL HISTOLOGY. 



secreting hepatic tissue, comprising the liver- cells, the bile -capil- 

 laries, the minute channels through which the bile elaborated within 



FIG. 219. 



Section of injected human liver, the capillaries having been filled from the central vein (a) ; 

 b, branches of portal vein. 



the lobule is carried off, together with lymph-radicles and a very 

 small amount of delicate areolar tissue. The liver-cells are irreg- 

 ular polyhedral elements (17 



25 p) in whose finely granular FIG. 221. 



protoplasm, devoid of cell-mem- 

 brane, one or more round nuclei 

 lie embedded. Numerous oil- 

 drops of various sizes, as well as 

 pigment - granules, very com- 

 monly are present within the 



FIG. 220. 



Hepatic cells isolated from human liver : a, Section of uninjected human liver : a, cords of 

 oil-drops ; b, slight concavity produced by liver-cells lying between the blood-channels (b}. 



blood-vessels 



protoplasm. The variations in the apparent granularity of the cells 

 depend, as in other glands, upon the condition of functional activity : 



