Chap. XXVII.] 



THE 



211 



more or less lamellated; by it the substance of 

 the liver is subdivided into numerous, more or less 

 polyhedral, solid lobules or acini (Fig. 123), each about 

 ^th of an inch in diameter. According to whether 

 the interlobular 

 tissue forms com- 

 plete boundaries 

 or not, the acini 

 appear well de- 

 nned from one 

 another (pig, ice- 

 bear), or more or 

 less fused (man 

 and carnivorous 

 animals and ro- 

 dents). 



Within each * 



acinus there is 

 only very scanty 



Connective tissue, Fig. 123. From a Section through the Liver 

 ; -fUo altars ^f of Pig. Five lobules are shown. They are 

 Ul the Shape Ot u Separated from one another by the 



extremely delicate interlobular tissue. 



Vmnfllpc nnrl flat *, Interlobular connective tissue, containing the 

 interlobular blood-vessels, i.e., the branches of the 



fonorl o/vnno/fiiro hepatic arterv and portal vein, and the interlobular 

 bile ducts; i, intralobular or central vein. (Atlas.) 



tissue cells. Occa- 

 sionally, especially in the young liver, migratory 

 cells are to be met with in the acini and in the tissue 

 between them. 



279. The vena portse having entered the hiluin 

 gives off rapidly numerous branches, which follow the 

 . interlobular tissue in which they are situated, and 

 they form rich plexuses around each acinus ; these are 

 the interlobular veins (Fig. 124). Numerous capillary 

 blood-vessels are derived from these veins. These 

 capillaries pass in a radiating direction to the centre 

 of the acinus, at the same time anastomosing with 

 one another by numerous transverse branches. In the 



