STRUCTURE OF THE LIVER. 



253 



lobules. At the transverse fissure it is merged in the areolar 

 investment called Glisson's capsule, which surrounding the 



FIG. 83. 



Under surface of the liver (from Bonamy). 



R, right lobe ; L, left lobe ; Q. lobus quadratus ; S, lobus Spigelii ; C, lobus caudatus ; 

 1, umbilical vein in longitudinal fissure; 2, gall-bladder in its fissure; 8, hepatic ar- 

 tery in transverse fissure ; 4, hepatic duct in transverse fissure ; 5, portal vein in 

 transverse fissure; 6, line of reflexion of peritoneum; 7, vena cava; 8, obliterated 

 ductus venosus ; 9, ductus commuuis choledochus. 



FIG. 84. 



portal vein, hepatic artery, and hepatic duct, as they enter at 

 this part, accompanies them in 

 their branchings through the sub- 

 stance of the liver. 



The liver is made up of small 

 roundish or oval portions called 

 lobules, each of which is about ^ 

 of an inch in diameter, and com- 

 posed of the minute branches of 

 the portal vein, hepatic artery, he- 

 patic duct, and hepatic vein ; while 

 the interstices of these vessels are 

 filled by the liver cells. These cells (Fig. 84), which make 

 up a great portion of the substance of the organ, are rounded 

 or polygonal, from about g ^ to j^ of an inch in diameter, 

 containing well-marked nuclei and granules, and having 

 sometimes a yellowish tinge, especially about their nuclei ; fre- 

 quently, they contain also various sized particles of fat (Fig. 

 84 A). Each lobule is very sparingly invested by areolar tis- 

 sue. 



To understand the distribution of the bloodvessels in the 



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