THE INTERNAL SPERMATIC ARTERIES 



599 



ing with it through the inguinal canal and out of the subcutaneous inguinal (ex- 

 ternal abdominal) ring, run downward into the scrotum in a tortuous course to the 

 testes. They terminate in branches to the epididymis and body of those organs. 

 Within the abdomen they lie beneath the peritoneum, and cross in their descent 

 over the ureters and distal ends of the external iliac arteries; the right being super- 



FiG. 484. — A. The Renal Artery and the Distribution of its Branches in Relation 

 TO the Pelvis. B. Transverse Section through the Middle of the Same Kidney. 

 (After Brodel, Johns Hopkins Hospital Bulletin.) 



a, renal artery; a' and a", its anterior and posterior branches; b, branches to pyramids; c, line 

 of division between anterior and posterior pyramids. The arrow and dotted hne indicate 

 the hne of separation between the terminals of the anterior and posterior branches. 



ficial to the vena cava, and behind the termination of the iteum; and the left 

 beneath the sigmoid colon. In the inguinal canal and in the scrotum the sper- 

 matic veins he in front of the artery, and the ductus deferens lies behind it. 



In the foetus these vessels pass in a transversely lateral direction to the testis, 

 which in early foetal hfe lies in the loin in front of the kidney; but as the testes 



