120 DISTRIBUTION OF THE ARTERIES. 



The renal or emulgent arteries leave the aorta at right 

 angles just below the preceding vessel ; they each pass into 

 the respective kidneys, and therein divide into branches that 

 penetrate the glandular substance. 



The spermatic arteries, right and left, originate from the 

 under part of the aorta; they pass out of the abdomen, at the 

 abdominal ring, to the testicles. In the female, they pass 

 to the ovaries, Fallopian tubes, and horns of the uterus. 



The posterior aorta also gives off the small mesenteric, and 

 five or six pairs of lumbar arteries. Under the last lumbar 

 vertebras, the aorta gives off two pairs of arterial trunks, called 

 the external and internal iliacs. 



The internal iliacs give off a branch called the artery of the 

 bulb, and afterwards branch into three divisions — the obtura- 

 tor, gluteal, and lateral sacral arteries. 



The artery of the bulb passes to the bulb of the penis, 

 where it terminates. In the female, this artery sends its ter- 

 minating branches to the vagina. It gives off the foetal um- 

 bilical artery. In leaving the pelvis, the prostatic artery, 

 which detaches twigs to the vesiculse seminales, also distributes 

 its ultimate ramifications to the prostate gland. It also gives 

 off divers branches, anal and perineal, to the posterior por- 

 tion of the rectum, anus, and parts comprising the perineum. 



The obturator artery is the lowest of the divisions of 

 the internal iliac. Its branches are the arteria innominata, and 

 ramifications to the obturator muscles and ligaments. Its di- 

 visions are the ischiatic, which distributes its branches to the 

 triceps ; next, the pubic : the internal pubic artery gives two 

 sets of branches, which pass to the penis. 



The gluteal artery is destined principally to supply the 

 gluteal muscles. 



The lateral sacral artery, having reached the coccyx, 

 divides into two branches. It furnishes the sacro-spinal 

 branches, five or six in number, and the perineal artery. It 

 soon divides into several ramifications, of which many run 

 into the gluteal muscles ; others descend on the back of the 

 thigh, and others are distributed to the anal muscles, and to the 



