THE COMMON ILIAC ARTERIES. 249 



branches to the caecum and small intestine, anastomosing 

 with the colica dextra and vessels of the small intestine. 

 5. Vasa intestini tennis, a number of branches to the 

 small intestine. The arteries to the intestines exhibit a 

 remarkable series of anastomoses ; they are not directly 

 distributed, but form arches and loops, and from the 

 convexities of these the branches pass to the intestines. 



Inferior Mesenteric. Supplies the descending colon 

 and sigmoid flexure of the rectum. It sends off three 

 brandies : 1 . The colica sinistera, supplies the dscending 

 colon and anastomoses above with the colica media, below 

 with the sigmoid. 2. The sigmoid are several branches 

 distributed to the sigmoid flexure of the colon. 3. The 

 superior hsemorrhoidal, the terminal branch, anastomoses 

 freely with the other vessels distributed to the rectum. 



Supra-renal. Are a pair of small branches which 

 pass outward to the supra-renal capsules. 



Renal. Are a pair of large vessels coming off at 

 right angles from the aorta and distributed to the kid- 

 neys. Each vessel subdivides into four or five branches. 



Spermatic. A pair of vessels which pass to the 

 testes of the male. They are displaced by the ovarian 

 in the female, and run in the inguinal canal, with the 

 spermatic cord. In the female they are shorter and pass 

 between the layers of the broad ligaments to the ovaries. 



Lumbar. Are four or five pairs which come off at 

 right angles to the aorta and are distributed to the lumbar 

 muscles. 



Sacra Media. A branch which runs down the 

 middle of the sacrum. It is given off from the bifurcation 

 of the abdominal aorta into the two common iliacs. 



THE COMMON ILIAC ARTERIES. 



The abdominal aorta, on the left side of the body of 

 the fourth lumbar vertebra, divides into the right and left 



