194 



MANUAL OF HISTOLOGY. 



joining surfaces of two contiguous cells, and rarely in the 

 canals formed by the edges of three or more cells (Hering '). So 

 that while the blood-capillaries occupy the canals previously 

 described, the bile-capillaries form an independent network be- 

 tween the boundary surfaces of the liver-cells (Figs. 84 and 85). ' 

 In cross sections they may be seen, appearing as small, circular 



FIQ. 85. 



Flos. 84 and 85. Injected liver of rabbit. The narrow, reticulated bile-capillaries are shaded with 

 longitudinal, the broader blood-capillaries with transverse lines. Within the boundary line or septum of 

 two contiguous cells the cross-section of a bile-capillary is seen as a dark spot or point. The liver celU 

 contain one or two nuclei. In Fig. 84, the bile-capillaries are slightly distended by the artificial injec- 

 tion ; in Fig. 85, markedly so: Hering. 



openings between the cells, while in longitudinal sections they 

 present a linear arrangement (Figs. 85 and 86). In the dog 

 this arrangement is the same, only here the bile-capillaries 

 occur more frequently in the canals formed by the edges of the 

 lower cells. 



x 



According to Hering, both in rabbits' and dogs' livers the blood-capillaries 

 are separated from the bile-capillaries by the intervention of at least one liver- 

 cell. Livers in which the bile-capillaries have been injected by the natural 

 method with indigo-carmine do not always demonstrate this. And here it may 

 be remarked, that in artificial or forced injections of the bile-capillaries they 

 are always distended beyond their natural diameters.* 



1 Hering : Ueber den Ban der Wirbelthierleber, and article on Liver in Strieker's 

 Manual. 



* Compare Figs. 84 and 85, after Hering. Even in Fig. 84 the bile-capillaries are 

 larger than they ougbt to be. In an article on the liver by Dr. W. G- Davis, in the 

 Amer. Jour. Med. Sci., Vol. LXXVIII., the distention of the capillaries is excessive. 



