468 DISSECTION OF THE ABDOMEN. 



lobe on the other, is the transverse or portal fissure. It is situate nearer 

 the posterior than the anterior border, and contains the vessels, nerves, 

 ducts, and lymphatics of the liver. At the left end it is united at a right 

 angle with the longitudinal fissure. 



Fig. 158. 



<D /^ik 



|p 



K "5 



I 

 f -5 



^ o 



J '-o 

 3 



a. .- 



E 



USDER SURFACE OF THE LIVER. 



JJ A. Right, and B, left lobe. c. Round ligament. 



^* c. Quadrate lobe. d. Obliterated dnctns venosus. 



|^^ D. Spigelian, and E, caudate lobe. e. Common hepatic duct. 



F. Longitudinal fissure. f. Cystic duct, 



a. Gall-bladder. g. Common bile duct. 



a. Vena cava. h. Hepatic artery. 



b. Vena portse. 



The longitudinal fissure, F, extends from the front to the back of the 

 liver, between the right and left lobes. In the part anterior to the trans- 

 verse fissure lies the remnant of the umbilical vein (c), which is called 

 round ligament, and is oftentimes arched over by a piece of the hepatic 

 substance (pons hepatis). In the part behind that fissure is contained a 

 small obliterated cord (of), the remains of the vessel named ductus venosus 

 in the foetus. 



The groove for the vena cava is placed on the right side of the Spigelian 

 lobe, and is frequently bridged over by the liver. If the cava be opened, 

 two large and some smaller hepatic veins will be observed entering it. 



fossae. On the under surface of the right lobe are three depressions 

 one for the gall-bladder to the right of the square lobe ; another for the 

 colon, near the anterior edge; and a third for the kidney near the posterior 

 border. 



Vessels of the transverse fissure. The vessels in the transverse fissure, 

 viz., vena portse, hepatic artery and duct, have the following position: the 

 duct is anterior, the portal vein posterior, and the artery between the 

 other two. 



The hepatic duct (fig. 158, e) is formed by two branches from the liver, 

 one from each lobe, which soon blend in a common tube. After a distance 

 of one inch and a half it is joined by the duct of the gall-bladder (/) ; and 

 the union of the two gives rise to the common bile duct (o). 



