276 THE VASCULAR SYSTEMS 



(/) The dorsal artery of the penis runs between the symphysis 

 and the penis to the glans and prepuce. Here it is superficial, 

 and lies upon the crus penis, pierces the suspensory ligament, 

 and runs along the dorsum between the median vein and the 

 corresponding nerve. 



In the female the pudic artery is smaller, but has analogous 

 branches. The superficial perinea! artery runs to the labia; 

 that of the bulb to the bulbus vestibuli; that of the corpus 

 cavernosum to the corresponding part of the clitoris; and the 

 dorsal artery to the glans clitoridis. 



(g) The sciatic accompanies the pudic, resting on the pyri- 

 formis muscle and the sacral plexus, escapes by the great fora- 

 men, and descends, midway between the tuber ischii and the 

 trochanter major, with the sciatic nerves. 



The branches are: (a) the coccygeal, (fr) the muscular, (c) the 

 comes nerm ischiadici, (d) the anastomotic, (e) the articular 

 branches. 



The external iliac artery extends from the division of the com- 

 mon iliac to the mid-point between the symphysis of the pubis 

 and the anterior superior spine of the ilium, behind Poupart's 

 ligament. 



Relations. In front, the peritoneum, subperitoneal fascia, sig- 

 moid flexure on the left, ileum on the right side, lymphatic 

 vessels and glands, spermatic or ovarian vessels, deep circum- 

 flex iliac vein, genital branch of the genitocrural nerve and, at 

 times, the ureter; behind, psoas muscle and iliac fascia and its 

 vein; internally, its vein and the vas deferens; externally, psoas 

 and iliac fascia. 



The branches of the external iliac artery : (a) The deep epi- 

 gastric descends to Poupart's ligament, then ascends, internal 

 to the deep ring, between the transversalis fascia and the peri- 

 toneum. It then pierces the fascia and enters the sheath of the 

 rectus, ascending on the posterior surface of the muscle, and 

 dividing into branches which join the superior epigastric. The 

 vas deferens in the male, round ligament in the female, cross the 

 vessel on its outer side at the internal ring. 



Branches. The cremasteric, to the cord; the pubic, to the 

 back of the pubis, joining the pubic of the obturator; and the 

 muscular. 



(b) The deep circumflex iliac passes to the anterior superior 

 spine in a sheath of the transversalis and iliac fascia, thence 



