142 



ABDOMINAL AORTA. 



the ascending colon, and cnlica tncdia^^'^ supplying the arch of the 

 colon. (Fig. 128.) 



Capsular^ arise from the aorta or renal, and supply the supra- 

 renal capsules. 



Fig. 1-23. 



Renal or emuJgent}'' — These are of large diameter, though not 

 very long. They pass transversely to the kidney, and divide into 

 several branches before entering it. The right is longer and more 

 oblique in its course than the left, and is partly concealed by the 

 ascending vena cava, (Fig. 122.) 



Spermatic ^'^ — These are about the size of a large knitting-needle, 

 arising from the aorta and sometimes from the renal. They are 

 tortuous in their course and pass through the abdominal rings ; after 

 which they divide into several branches before reaching the testicles. 



Inferior mesenteric,'^^ arises from the aorta an inch above its bifur- 

 cation. (Fig. 124.) It is about the size of a goose-quill, and gives 

 off the superior left colic^^^ tniddle left colic^^^ and inferior left colic. 

 arteries, which supply the descending colon and also the superior 

 hcdrnorrkoidal,^^ which is distributed to the upper part of the rectum. 



