636 



THE VEINS 



Tributaries. — The pyloric, the gastric, the cystic (which latter usually enters 

 the right Ijrancli), the superior mesenteric, and the splenic. 



The pyloric vein hegins near the pylorus in the lesser curve of the stomach, 

 and, running from left to right with the superior pyloric artery, opens directly into 

 the lower part of the portal vein. It receives hranches from the pancreas and 

 duodenum. 



Tlie gastric or coronary vein runs with the gastric artery at first from right to 

 left, along the lesser curve of the stomach, towards the cardiac end, and then, turning 

 to the right, passes across the spine from left to right to end in the portal trunk a 

 little higher than tlie pyloric vein (fig. 392). At the cardiac end of the stomach it 

 receives small branches from the oesophagus. 



Fig. 393. — The Superior Mesenteric Veix. 

 (The colon is turned up, and the small intestines are drawn over to the left side.) 



Ileo-colic artery 



VERMIFORM 

 APPENDIX 



Lcjl colic artery 



Superior mesen- 

 teric artery and 

 rein 



Vasa inlestini 

 tenuis 



SMALL INTESTINES 



The cystic vein returns the blood from the gall-l)ladder. It usually opens into 

 the right l^ranch of the j^ortal vein. 



The superior mesenteric vein begins in trilnitaries which correspond with the 

 branches of the superior mesenteric artery. It courses upwards a little, in front and 

 to the right of the artery, passing wdth that vessel from between the layers of the 

 mesentery in front of the duodenum, and behind the pancreas, where it joins the 

 splenic vein to form the portal trunk. 



Tributaries. — In addition to the tributaries corresponding to the branches of 

 the superior mesenteric artery — viz. the ileo-colic. right colic, middle colic, and 

 small intestinal veins (fig. 3*93) — it receives the right gastro-epiploic and the 

 pancreatico-duodenal veins just before its termination in the portal vein. 



