PANCREAS AND LIVER. 



153 



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interwoven with each other, so that every space of the one 

 meshwork is occupied by portions of the other. 



After suitable treatment, 

 as Beale and Wagner found, 

 thin sections of the hard- 

 ened hepatic tissue show an 

 uncommonly elegant reticu- 

 lar tissue of a right delicate, 

 homogeneous, nucleated, 

 connective substance (Fig. 



143, a). 



In the last period of fcetal 

 life, or in the new-born (Fig. 

 143), this consists distinctly, 

 in places, of a double mem- 

 brane. The one layer corresponds to the capillary walls (and 

 shows here and there a combination of the flat, vascular cells 

 — Eberth) ; the other, investing the hepatic cell-trabeculse, 

 represents a finest membrana propria. 



Fig. 143. — Frame-work substance from the rab- 

 bit's liver ; <7, homogeneous membrane with nu- 

 clei : 6, thread-like strands of the latter ; e, sev- 

 eral hepatic cells still retained. 







Fig. 144. — Biliary capillaries of the rabbit's liver. 1. A part of the lobule ; <7, vena hepatica : 

 b. branch of the portal vein ; c, biliary ducts ; d, capillaries. 2. The biliary capillaries (i) in their 

 relation to the capillary blood-vessels (a). 3. The relation of the biliary capillaries to the hepatic 

 cells ; a, capillaries ; b, hepatic cells ; c, biliary ducts ; d, capillary blood-vessels. 



Great difficulty was encountered, during a long period, in 

 the investigation of the finest biliary passages (Fig. 144). A 



n* 



