SUPEBIOE, MESENTERIC VEIN. 



481 



rately from the fissure of the spleen, and soon join to form a single vessel. 

 It is directed from left to right beneath the pancreas, in company with the 

 splenic artery, below which it is placed. On reaching the front of the spine 

 it joins the superior mesenteric vein, nearly at a right angle. It receives 



Fig. 327. DIAGRAMMA- Fig. 327. 



TIC OUTLINE OP THE 

 PORTAL VEIN AND ITS 

 RELATION TO THE LlVER, 



&c. 4 



The liver is supposed 

 to be turned upwards so 

 as to present a poi'tion of 

 its under surface. a, 

 gall-bladder ; 6, square 

 lobe ; c, left lobe ; 1, 

 trunk of the vena portse ; 

 2, great or superior me- 

 senteric vein ; 2', its 

 middle colic branch, form- 

 ing loops of communica- 

 tion between the right 

 and left colic veins ; 3, 

 intestinal branches ; + , 

 small pancreatico-duode- 

 nal branch ; 4, right 

 colic branch ; 5, ileo- 

 colic ; 6, coronary vein of 

 the stomach ; + +, right 

 gastro-epiploic ; 7, sple- 

 nic vein ; 7', its branches 

 to the spleen ; 7", its 

 branches to the stomach ; 

 8, inferior mesenteric 

 vein ; 9, left colic branch ; 

 9', its communication 

 with the middle colic ; 

 10, sigmoid ; 11, hsemor- 

 rhoidal ; 12, the right, and 



13, the left division of the 

 vena portse in the trans- 

 verse fissure of the liver ; 



14, the obliterated cord 

 of the umbilical vein 

 passing through the an- 

 tero-posterior fissure to 

 join the left division of 

 the vena portse ; 15, the 

 obliterated cord of the 

 ductus venosus passing 



from the left division of the vena portse to one of the hepatic veins connected with 16, the 

 vena cava inferior, of which a part is represented in shade. 



gastric branches (vasa brevia) from the left extremity of the stomach, the 

 left gastro-epiploic vein, some pancreatic and duodenal branches, and also the 

 inferior mesenteric vein. 



MESENTEKIC VEINS. The superior mesenteric vein lies to the right side, 

 and somewhat in front of the artery of the same name. The distribution of 

 its branches corresponds with that of the superior mesenteric artery, and it 

 returns the blood from the several parts supplied by that vessel, viz., from 

 the small intestine, and from the ascending and transverse parts of the. 



