196 



MICROSCOPIC ANATOMY OF THE ORGANS. 



except that formed by the liver cells between which they are 

 situated. It seems that the bile capillaries begin in the interior 

 of the cell in canals like those of the secretory capillaries in 

 the parietal cells of the fundus of the stomach (Fig. 152). 

 According to Browicz, the beginning is in the nucleus, for he 

 succeeded in finding bile droplets there. In favor of the intra- 

 protoplasmic origin of secretory capillaries is the fact that 

 secretory vacuoles in the protoplasm are in connection with the 

 bile capillaries. 



FIG. 149. 



Framework of a lobule of the b 



of Langerbans. 



lowing tbe connective tissue of an island 



(Flint.) 



By means of Golgi's method, it is possible to demonstrate 

 the course of the bile capillaries and the presence of secretory 

 vacuoles. The latter begin as small droplets of bile in the cell, 

 which on reaching a certain size become discharged into the 

 bile capillaries between the cells. They represent only transi- 

 tory structures depending on the activity of the cell. Others 

 hold that these are stable intracellular bile paths, which often 

 contain bile and sometimes do not (Browicz). 



In mammals the bile capillaries anastomose with one 

 another, forming a network in which the liver cells lie. The 



