680 



THE LIVER. 



face, which indicate the location of the bile-capillaries. In places 

 where the blood-capillaries are cut transversely, most of the 

 bile-capillaries will also appear as darker dots between those 

 surfaces of neighboring epithelia which are most distant from 

 the parts that are in contact with the capillaries. (See Figs. 

 299 and 300.) 



FIG. 299. BELATION BETWEEN 

 THE CAPILLARY BLOOD-VES- 

 SELS AND THE EPITHELIA, IN 

 A LONGITUDINAL DIRECTION. 

 LIVER OF A BABBIT. BILE- 

 CAPILLARIES INJECTED. 



E, liver epithelia ; S, bile-capillaries ; 

 C, capillary blood-vessels. Magnified 

 1000 diameters. 



FIG. 300. EELATION BETWEEN 

 THE CAPILLARY BLOOD - VES- 

 SELS AND THE EPITHELIA, IN 

 A TRANSVERSE DIRECTION. 

 LIVER OF A BABBIT. BILE- 

 CAPILLARIES INJECTED. 



E, liver epithelia ; , bile-capillaries ; 

 C, capillary blood-vessels. Magnified 

 1000 diameters. 



In the liver of the cat the relations of the bile-capillaries to 

 the epithelia are somewhat different, inasmuch as the capillaries 

 run both along the surfaces and the edges of the epithelia (see 

 Fig. 302). In the liver of man most of the bile-capillaries run 

 along the edges of the epithelia, and to this is due the appear- 

 ance of the small, light apertures, which are seen at the point 

 where three or four epithelia meet (see Fig. 297). The difficulties 

 in discriminating between occluded blood-capillaries and bile- 

 capillaries I have before alluded to. Should the conception be 

 correct, that several liver epithelia lie around a central bile- 

 capillary, while the opposite broad surfaces of the epithelia are 

 in contact with the blood-vessels, a tubular arrangement of the 

 liver epithelia might become admissible. Some authors have 



