THE LIVER 193 



FISSURES : 



The longitudinal fissure is occupied by the round ligament, 

 and divides the organ into right and left lobes ; it is separated 

 into two parts by its union with the transverse fissure. 



The anterior part or umbilical fissure contains the remains 

 of the umbilical vein, and lies between the left lobe and the 

 lobus quadratus. The posterior part or fissure of the ductus 

 venosus lies between the left lobe and the lobus Spigelii, and 

 contains the remains of the ductus venosus. 



The transverse or portal fissure is placed at right angles to 

 the longitudinal fissure, between the lobus quadratus and the 

 lobus Spigelii, and lodges the hepatic ducts, artery, and portal 

 vein, nerves and lymphatics. The artery lies between the 

 duct in front, and the vein behind. 



The fissure for the inferior vena cava is placed obliquely at 

 the posterior margin of the liver, behind the gall-bladder, 

 lying between the right lobe and the lobus Spigelii, and sepa- 

 rated from the transverse fissure by the lobus caudatus. The 

 hepatic veins enter the vena cava at the bottom of this fissure. 



LOBES : 



Right and left lobes are separated from each other by the 

 umbilical fissure on the under surface, and posteriorly by th^ 

 fissure of the ductus venosus. The right is the larger, ami 

 contains the transverse fissure and fissure for the inferior 

 vena cava ; is subdivided into the three following lobes : 



Tiie lobus quadratus : bounded by the umbilical and trans- 

 verse fissures and the fossa of the gall-bladder. 



The lobus Spigelii is on the posterior surface, and is the 

 projection between fissures for the inferior vena cava and 

 ductus venosus, behind the transverse fissure. 



The lobus caudatus connects the preceding lobe with the 

 main mass of the right lobe, and lies behind the transverse 

 fissure. 



FOSSA : 



The fossa for the gall-bladder lies on the under surface of 

 the right lobe, parallel to the umbilical fissure, and separates 

 the quadrate lobe from the main mass of the right lobe. 



THE GALL-BLADDER AND BILE-DUCTS. 



The gall-bladder is a conical bag placed in a fossa on the 

 under surface of the right lobe of the liver. Its upper surface 

 is attached to the liver, and its fundus and posterior surfaces 

 are invested by peritoneum reflected from the adjacent surface 

 of the liver. 



Relations. The body is in relation in front with the liver 



13 



