176 MANUAL OF PHYSIOLOGY. 



in rows radiating from the centre of the lobule toward the 

 periphery. 



The capillary meshes are said to pass along the angles and 

 edges of these cell blocks so as not to come into close relation 

 to the smaller channels or bile capillaries about to be described 

 (Fig. 75). The finely granular protoplasm of the liver cells is 

 capable of undergoing some slight change in form while alive. 

 In the protoplasm are commonly situated varieties of granules, 

 the commonest being bright, refracting, fat globules, which vary 

 in amount with the different stages of digestion, others, of a yellow 

 color, seem connected with the coloring matter of the bile, and a 



FIG. 75. 



Section of the Liver of the Newt, in which the bile ducts have been injected, and can 

 he seen to foim a network of fine capillaries around the liver cells, the outlines and 

 nuclei of which can be seen. 



third variety, less refracting and colorless, is said to be related 

 to the glycogen. 



Between the cells of the lobules there can be demonstrated 

 very fine, straight, anastomosing canals, which appear to be 

 formed by the juxtaposition of grooves which lie in the middle 

 of the flat surface of two neighboring cells. Every liver cell is 

 related to such a canal, and consequently a very dense network 

 with peculiarly regular polygoneal meshes is present, each mesh 

 corresponding in size to one cell. 



These fine intercellular canals are called lobular bile capillaries, 

 and must not be confounded with lobular blood capillaries, the 



