ABDOMINAL CAVITY 



hepatic artery, which carries arterial blood, has already been 

 examined, p. 300. The portal vein, which carries the venous 

 blood from the whole of the abdominal part of the alimentary 

 canal, except the anal canal, and from the spleen, the 

 pancreas, and the gall-bladder, must now be studied. It is 



Ligamentum venos 



Inferior vena cava 

 : hepatic vein (systemic and portal blood) 



Liver capillaries 



Right branch of portal vein _ 



Cystic vein rr=T 



Portal vein 



Pancreatico-duodenal vein 



Superior mesenteric vein 

 Middle colic vein 



ight colic veil 



Ileo-colic vein , 

 I leal veins 



Lowest ileal vein 



Right common iliac vein _1 



Right hypogastrie vein - 



Right external iliac vein ~ 



Right middle ha-morrhoidal vein < - 



Right inferior haemorrhoidal vein 



gamentum venosum 



Left hepatic vein (systemic and portal blood) 

 Left branch of portal vein 

 Liver capillaries 



Oisophageal veins 



.,- Coronary vein 



Short gastric veins 



Splenic veins 



~- Left gastro-epiploic vein 



-^~~- Splenic vein 



"- Right gastro-epiploic vein 

 Inferior mesenteric vein 



Left colic vein 



Ligamentum teres hepatis 



Region of umbilicus 

 Jejunal veins 



Sig moid vein 



Left common iliac vein 



'Superior haemorrhoidal vein 



Left hypogastric vein 



Left external iliac vein 



Left middle haemorrhoidal vein 



Left internal pudendal vein 



-Left inferior haemorrhoidal vein 



FlG. 162. Schema of the Portal System of Veins and its connections with 

 the Systemic System. It must be remembered that the systemic blood 

 carried by the hepatic artery also enters the liver capillaries, therefore 

 the hepatic veins contain both portal and systemic blood. 



formed by the union of the superior mesenteric and splenic 

 veins, behind the neck of the pancreas, between the neck and 

 the upturned uncinate process of the head of the pancreas. 

 It ascends, behind the first part of the duodenum and in 

 front of the inferior vena cava, to the lower margin of the 

 epiploic foramen, where it leaves the vena cava, enters the 

 lesser omentum, and continues upwards, in front of the 

 epiploic foramen and behind the bile-duct and the hepatic 



