THE LIVEE. 

 Fig. 368. 



535 



Transverse section of hepatic islets (horse), showing the secreting cells forming lines radiating from 

 the hepatic vein (a) in the centre, towards the circumference (6). Injected with vermilion. (Dr. Beetle.) 



the islet. There is usually but one row (sometimes two) of cells 

 between the capillary vessels. He further ascertained that these 

 rows of cells are contained within tubes formed of simple membrane; 

 which is sometimes incorporated with the walls of the capillaries, 

 and sometimes distinct from them. (Fig. 369.) These cell-con- 

 taining tubes, therefore, form the network in the substance of the 



islet. 



Fig. 369. 



Tubes of simple membrane containing the liver-cells (pig), a. An injected specimen, the shades 

 showing the injection. 6. Cells and free oil-globules within the tube. c. Tube in which the cells 

 hare been disintegrated. Magnified 200 diameters. (Dr. Beale.) 



