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HANDBOOK OF PHYSIOLOGY. 



called lobules, each of which is about ^ of an inch (ahout 1 mm.) in 

 diameter, and composed of the minute branches of the portal vein, he- 

 patic artery, hepatic duct, and hepatic vein; while the interstices of these 



/.* 



Z..1. 



Fig. 266. The liver from below and behind. ,., Spigelian lobe; L.C., caudate lobe; L.Q., 

 quadrate lobe: R.L., right lobe; L.L., left lobe; g.bl., gall-bladder; v.c.i., inferior vena cava 

 u./., umbilical fissure; f.d.v., fissure of the ductus venosus; p, portal fissure with portal vein, 

 hepatic artery and bile-duct. (Wesley, from a His model.) 



vessels are filled by the liver cells. The hepatic cells (fig. 254), which 



form the glandular or secreting part of the liver, are of a spheroidal 



form, somewhat polygonal from mutual pressure about -^-g- to y^^ inch 



(about ^ 2 to 4V mm.) in diameter, possessing one, sometimes two nuclei. 



The cell-substiince contains numerous fatty molecules, and possibly some 



granules of bile-pigment, as well 



as a variable amount of glycogcn. 



The cells sometimes exhibit slow 



amoeboid movemeDts. They are 



held together by a very delicate 



sustentacular tissue, continuous 



with the interlobular connective 



tissue. 



Fig. 267. Fig. 268. 



Fig. 267. A. Liver-cells. B. Ditto, containing various-sized particles of fat. 



Fig. 268. Longitudinal section of a portal canal, containing a portal vein, hepatic artery and 

 hepatic duct, from the pig. p, branch of vena portae, situate in a portal canal formed among the 

 lobules of the liver, I, f, and giving off vaginal branches; there are also seen within the large portal 

 vein numerous orifices of the smallest interlobular veins arising directly from it; cu hepatic 

 artery; d, hepatic duct. X 5. (Kiernan). 



