KOALA. 



It is traced upwards as an elongated process in relation 

 with the pancreatic and common ducts towards the liver, 

 so that it conies in relation with the lesser omentum. 

 Traced to the left it narrows to about 1.5 cm., lying in 

 close relation to the dorsal abdominal wall above the duod- 

 intest. junction, and is traced to the left of the distal colon 

 and its mesocolon lying just above the left adrenal gland. 

 It then enters the dorsal wall of the lesser sac. On reach- 

 ing the spleen, which is suspended on the great omentum, 

 it widens out, forming a piece which measures 5 cm. long 

 and 3 cm. wide, in a well-developed specimen. The upper 

 part of this is related to the body and beginning of anterior 

 thin elongated process, while the lower part is in relation 

 with the short broad left posterior process, beyond which 

 it usually extends. As the lieno-mesocolic fold is absent, 

 this latter process of spleen and pancreatic tissue related 

 to it might be regarded as related to the lesser sac being 

 swung on the great omentum. The pancreas may form 

 a tongue-shaped process extending 3 cm. beyond the con- 

 fines of the spleen. To sum up, the chief relation of the 

 pancreas is to the short left process and the lower part of 

 the body, of spleen, the upper half of the body and the 

 light elongated omental process being practically devoid. 



Portal Vein. — Five main branches are usually to be 

 distinguished. Proximally we notice two, one on each 

 side — the left sending branches to the left cvstic or mesial 

 and left lateral lobes, and the right branches to the right 

 lateral lobes. More distally a branch is sent on the right 

 to the right mesial or cvstic. The vein finally terminates 

 in two branches, one passing to the right cystic or mesial, 

 and the other to the intermediate cvstic lobe. 



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