182 



THE ESSENTIALS OF HISTOLOGY. 



In some animals, as in the pig, this separation is complete, and each 

 lobule is isolated, but in man it is incomplete. There is also a layer 

 of connective tissue underneath the serous covering of the liver, and 

 forming the so-called capsule of the organ. 



FIG. 213. SECTION OF A POKTAL CANAL. 



, branch of hepatic artery ; v, branch of portal vein ; d, bile-duct ; /, /, lymphatics in the 

 areolar tissue of Glisson's capsule which incloses the vessels. 



FIG. 214. DIAGRAMMATIC REPRESENTATION OF TWO HEPATIC LOBULES. 



The left-hand lobule is represented with the intralobular vein cut across ; in the right-hand 

 one the section takes the course of the intralobular vein, p, interlobular branches of the 

 portal vein ; h, intralobular branches of the hepatic veins ; s, sublobular vein ; c, capil- 

 laries of the lobules. The arrows indicate the direction of the course of the blood. The 

 liver-cells are only represented in one part of each lobule. 



The blood-vessels of the liver (portal vein and hepatic artery) enter it 

 on its under surface, where also the bile-duct passes away from the 

 gland. The branches of these three vessels accompany one another 

 in their course through the organ, and are inclosed by loose connec- 

 tive tissue (capsule of Glisson), in which are lymphatic vessels, the 



