258 PRACTICAL ANATOMY. 



haemorrhoidal artery to the rectum ; (3) the left colic artery to the descending 

 colon. 



Summary. (i) The descending colon and rectum are supplied with blood 

 by the inferior mesenteric artery. The blood from this area is returned by the 

 inferior mesenteric vein, which passes behind the pancreas and is tributary to the 

 splenic vein. (2) The remaining part of the intestinal canal, below the stomach, 

 including the small intestine and the ascending and transverse colons, is supplied 

 by the superior mesenteric artery. The blood from this area is collected by veins 

 which come together to form, with the gastric and splenic veins, the portal vein. 

 The name portal circulation is given to the veins coming from all the abdominal 



Middle colic artery 



Inferior pancreattco- 



duodenal artery 



Superior mesenteric 



artery 



Riyht colic artery 



A bdominal aorta - 

 Vena cava inferior . 



Right common iliac _ 



artery 



Middle, sacral artery 

 and vein 



I.fft colic artery 



JuJ'erior inrsenleric 



1 1 in 



Inferior mrsni/i rir 

 artery 



Left co/ic ttrlerii 

 !iij< rior in i. ie liter ic 

 artery 



Left common iliac 



i-i in 



Sigmoid artery 



Superior tiii'tiiur 

 r/tuiilal tirlt-ry 



FIG. 181. THE INKKKIOK MISKN 1 1 UK- AKTKKY AND VKIN. 

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



organs of digestion, except the liver. This blood is laden with urea, glycogen, 

 and bile, all of which are removed from the blood in the li\vr. 



Anastomosis of Arteries to the Abdominal Organs of Digestion. (i) 



Tin- gastric artery from the cceliac axis supplies the abdominal part of the (esoph- 

 agus, the side of the stomach represented by the lesser curve, and anastomoses 

 with the hepatic, at the pyloric end. (2) The hepatic artery supplies the liver 

 and communicates, through the Castro-duodenal artery, with both the splenic 

 and superior mesenteric arteries. (3) The several branches of the mesenteries 

 successively anastomose, so you can trace- from (esophagus to rectum the con- 

 tinuous blood-supply to all the viscera of this system. 



Anterior Relations of the Right Kidney. The anterior surface of the 

 right kidney is occupied, from the kidney forward, (i) by the anterior part of the 

 fatty capsule ; (2) by the following organs : liver, duodenum, colon. For the 



