296 



THE ORGANS 



cogen, pigment granules, and droplets of fat and bile. Each cell 

 contains one or 7nore spherical nuclei. Like other gland cells, the 

 granularity of the protoplasm depends upon its functional condition. 

 Within the cells are minute irregular canals, some of which can be 



Fig. 198. — Part of Lobule of Human Liver, Golgi Method (technic 3, p. 301), to 

 show relations of bile duct to intralobular secretory tubules and of the latter to the liver 

 cells, a, Bile duct; b, cords of liver cells; c, blood capillaries; d, central vein; e, secretory 

 tubules. 



injected through the blood-vessels, while others are apparently 

 continuous with the secreting tubules (Fig. 199, A and B). 



The capillaries of the portal vein, as they anastomose and con- 

 verge from the periphery to the centre of the lobule, form long-meshed 



A B 



Fig. 199. — A, Cell from human liver showing intracellular canals (Browicz); c, 

 intracellular canal; n, nucleus. B, From section of rabbit's liver injected through portal 

 vein, showing intracellular canals (continuous with intercellular blood capillaries). 

 (Schafer.) 



capillary networks.* In the meshes of this network lie the anasto- 

 mosing secreting tubules. On account of the shape of the capillary 

 network, the liver cells, which form the walls of these tubules, are 



