176 



STUDENTS HISTOLOGY 



THE LOBULAR PARENCHYMA, CONCLUDED ORIGIN OF THE BILE- 

 DUCTS SAME SECTION AS BEFORE (Fig. 114) 

 OBSERVE : 

 (H.) 



1. The connection between the intralobular bile-capillaries 

 and the marginal or intralobular bile-ducts. (The manner of 

 connection between the above is as follows : The bile -capillaries 



FIG. 114. PORTION OF THE PERIPHERY OF A HEPATIC LOBULE SHOWING THE 

 ORIGIN OF A BILE-DUCT. STAINED WITH H^MATOXYLIN AND EOSIN (X400). 



A. Bile-capillaries in longitudinal section. 



B. Bile-duct. The bile-capillaries are simply chinks between the hepatic cells. In the for- 

 mation of a duct, the hepatic cells become altered in shape, elongated, and eventually become the 

 lining cells of the duct. A little connective tissue, thrown around the outside, completes the 

 structure as seen at B. 



C. Bile-capillary in transverse section. The larger clear spaces are blood-capillaries. 



are merely channels between the hepatic cells, and run, as a rule, 

 at a right angle to the blood -capillaries. They are probably 

 destitute of a wall in the human liver. As these channels ap- 

 proach the marginal part of the lobule, the hepatic cells surround- 

 ing the capillary are seen to change their form. They elongate, 

 becoming thinner, gradually losing their form as hepatic cells, and 

 assume a columnar type. At the same time, a few fibers of con- 



