TEE INTERNAL ILIAC ARTERIES. 627 



enter the erectile tissue of the corpus cavernosum ; one of them, more important 

 than the others by its vohime, is designated the artert/ of the corpus cavernosum. 



The obturator artery sometimes arises from the external iliac. 



Artery of the Corpus Cavernosum (Fig. 368, 20). — This vessel passes 

 on the inferior face of the ischium, backwards and inwards, reaches the crus penis, 



LATERAL VIEW OF THE GENlTO-URINARr ORGANS IN THE MALE. 



1, Abdominal aorta ; 2, external iliac artery ; 3, common origin of the prepubic and deep femoral 

 arteries ; 4, prepubic artery ; 5, posterior abdominal artery ; 6, external pudic artery ; 7, 

 subcutaneous abdominal artery ; 8, anterior dorsal artery of the penis ; 9, 9, anterior and posterior 

 branches of that artery ; 10, internal iliac artery ; 11, last lumbar artery ; 12, subsacral artery ; 

 13, gluteal artery; 14, iliaco-muscular artery; 15, umbilical artery; 16, internal pudic artery; 

 17, its vesico-prostatic branch; 18, iliaco-femoral artery; 19, obturator artery ; 20, artery of the 

 corpus cavernosum; 21, posterior dorsal artery of the penis — a branch of the preceding; 22, 

 spermatic artery ; 23, posterior mesenteric artery, c, Termination of the small colon ; R, rectum; 

 S, sphincter of the anus ; I, suspensory ligament of the penis ; I', suspensory ligament of the 

 rectum ; V, bladder ; m, ureter ; T, testicle , E, epididymis ; D, deferent canal , v, vesiculae 

 seminales; p, prostate ; p, Cowper's gland; r, crus penis ; s, ligament of the corpus cavernosum. 



and pierces it by several branches, after supplying some muscular divisions and 

 the posterior dorsal artery of the penis. 



The latter is situated on the dorsal margin of the penis, passes forward 

 between the two ligaments attaching that organ to the symphysis pubis, and 

 proceeds to anastomose with the posterior branch of the anterior dorsal artery 

 (Fig. 368, 21). 



7. Iliaco-femoeal Aetery (Figs. 368, 18 ; 370, 9). 

 Noticed as one of the terminal branches of the pelvic trunk, the iliaco-femoral 

 artery only exists as a vessel of a certain volume in SoUpeds. In other animals, 



