414 



THE DIGESTIVE SYSTEM 



FIG. 388. SHOWING THE CONNECTION BETWEEN THE INTRALOBULAR AND INTER- 

 LOBULAR BILE DUCTS IN THE CAT'S LIVER. 



a, interlobular vein; b, interlobular bile duct; c, intralobular bile capillaries. 

 Golgi stain and hematein. Highly magnified. (After Geberg.) 



granules of ferruginous PIGMENT, which are more prone to occur in 

 the interior of the lobule near the central vein. When present in con- 

 siderable amount this pigment can no 

 longer be considered a normal constit- 

 uent of the hepatic cell. Mitochondria 

 have also been described in the hepatic 

 cell (Policard, Compt. Eend. de Soc. et 

 BioL, 1, 66, 1909). An intracellular 

 canalicular apparatus can also be dem- 

 onstrated within the cytoplasm. By 

 some these channels have been inter- 

 preted as intracellular terminals of the 

 intercellular (intralobular) bile canal- 

 iculi, by others as fixation artifacts, 

 and still others regard them as a tro- 

 phospongium. Schaffer (1902) inter- 

 prets them in part as channels in rela- 

 tion with the blood sinusoids. Such in- 

 tracellular canaliculi undoubtedly ap- 

 pear under certain functional conditions, but it is uncertain whether 

 they are definite preformed channels, or simply transient secretory canals. 



FIG. 389. TYPES OF CELLS FROM A 

 SECTION OF THE NORMAL *HUMAN 

 LIVER. 



A, the usual type of liver cell; B, 

 fatty, and C, pigmented cells. 

 Types B and C were very scarce. 

 Hematein and eosin. X 900. 



