ARTERIES. 



men. Its branches in the pelvis are muscular; nutrient, to 

 the ilium; vesical, to the bladder; and pubic, to the back of 

 the pubis. [852] 



The internal pudic descends on the sacral plexus and then 

 runs through the great sciatic foramen below the Pyriformis; 

 then crossing the ischial spine, it runs through the small sciatic 

 foramen and along the wall of the ischio-rectal fossa in Alcock's 

 canal; then continuing between the layers of the triangular 

 ligament close to the pubic ramus, almost to the subpubic 

 ligament, it pierces the anterior layer of the triangular liga- 

 ment. Branches. (Buttock) : muscular and anastomotic. 

 (Ischio-rectal fossa) : inferior hemorrhoidal, to lower end of 

 rectum; superficial perineal, running forward on perineum 

 under superficial fascia; transverse perineal, running inward 

 at base of perineum. (Urethral triangle) : artery to the bulb, 

 to bulb of corpus spongiosum (or vestibule) ; artery of corpus 

 cavernosum, to crus penis (vel clitoridis); dorsal artery of 

 penis (or clitoris) , running along dorsum of the penis (or cli- 

 toris) to the glans. [853] 



The sciatic descends through the sacral plexus, runs through 

 the great sciatic foramen below the Pyriformis, and descends 

 in the buttock with the great sciatic nerve. Small visceral, 

 muscular, and neural branches arise in the pelvis. [854] 



External Iliac. Beginning at the lumbo-sacral joint this 

 runs along the pelvic brim, upon the iliac fascia, to a point 

 under Poupart's ligament midway between the symphysis 

 pubis and iliac anterior superior spine, and there becomes the 

 femoral artery. Its vein lies internal to it and both are en- 

 closed in a thin fascial sheath. Branches. Twigs to the Psoas 

 and the lymphatic glands; deep epigastric; deep circumflex 

 iliac. [856] 



The deep epigastric arises just above Poupart's ligament and 

 turns round the lower border of the peritoneal sac; then as- 

 cending along the inner side of the internal abdominal ring 

 and outer border of Hesselbach's triangle, it pierces the sheath 



[211] 



