THE LIVER. 



155 



Lobulus Spigelii,y behind the transverse fissure, and between the fissure 



for the ductus venosus and that for the vena cava. 

 LobTilus Caiidatusf a connecting ridge from the lobulus Spigelii to the 



right lobe ; it separates the transverse fissure from the fissure for the vena 



cava, and forms the roof of the foramen of Winslow. 



Describe the 5 Hepatic Vessels. They are the portal vein/ hepatic 

 artery,? hepatic duct,/ and lymphatics, situated in the transverse fissure, and 

 surrounded by the capsule of Glisson, also the hepatic veins in the fissure 

 for the vena cava. The 



Portal Vein,s formed by the superior and inferior mesenteric, splenic 

 and gastric veins (all the main veins of the abdomen except the renal), 

 is about 4 inches long. It enters the transverse fissure of the liver, where 

 it divides into two branches, and these again divide and subdivide to 

 ramify throughout the gland. Its branches are the 



Right Portal. Inter-lobular Veins. 1 ~\ L o ^ u j ar 



74- 



FIG. 74. 



Left Portal. Lobular Veins. 3 



Vaginal Branches. Intra-lobular Veins. 4 J 



Hepatic Veins, are the continuations of the intra-lobular, beginning as the 

 Sub-lobular Veins beneath 

 each lobule, and entering the 



inferior vena cava in the fis- * 



sure for that vessel. 



Hepatic Artery, f the nutrient 

 vessel of the liver; arises 

 from the cceliac axis, enters 

 the transverse fissure, and di- 

 vides into branches which 

 supply the cellular tissue, the 

 walls of the vessels, and the 

 investing membranes of the 

 liver, also forming a plexus in 

 each lobule which anasto- 

 moses with the terminal 

 branches of the portal vein. 



Hepatic Duct, about I ^ inch 

 long ; is formed in the trans- 

 verse fissure by the union of 

 the two main biliary ducts, from the right and left lobes. It joins the 

 cystic duct from the gall-bladder to form the Ductus Communis Chol6do- 

 chus. (See next page.) 



