518 A MANUAL OF ANATOMY. 



The right artery passes behind the vena cava, and is a 

 little longer than the left. 



(7) The right and left spermatic. Each is a long, slender 

 artery that passes with the spermatic cord through the in- 

 ternal abdominal ring, the inguinal canal, and external ring 

 to the scrotum as far as the testicle, which it supplies. The 

 artery lies behind the peritoneum, and joins the cord (vas 

 deferens) just before the internal abdominal ring is reached. 



In the female the artery is the ovarian, and supplies the 

 ovary and uterus. It has the same origin, and course until 

 it enters the broad ligament and passes to supply the ovary 

 and uterus. 



(8) The right and left second lumbar arteries. See 

 below. 



(9) The inferior mesenteric. See page 512. 



(10) The right and left third lumbar. See below, 

 (i i) The right and left fourth lumbar. 



The lumbar arteries arise from the posterior surface of 

 the aorta, opposite the bodies of the lumbar vertebrae, pass 

 outward beneath the origin of the psoas, then behind the 

 quadratus lumborum, finally between the transversalis and 

 internal oblique, and are distributed to the abdominal wall 

 as far forward as the rectus muscle, anastomosing with the 

 other abdominal arteries. 



( 1 2) The right and left common iliacs. See below. 



(13) The sacra media. This small artery arises from 

 the posterior surface of the aorta just above its bifurcation, 

 passes down in front of the middle of the sacrum to the 

 coccyx. It anastomoses with the sacral branches from in- 

 ternal iliac arteries. 



The Common Iliac Arteries. Figs. 103 to 107 



They extend from the bifurcation of the aorta, at the 



