88 THE POCKET ANATOMY 



trunk near it, courses transversely inwards, supplying integu- 

 ments, etc. 



Artery of bulb : arises near base of triangular ligament, as 

 internal pudic artery lies between the two layers of triangular 

 fascia, it then pierces anterior layer, reaching bulb ^ inch 

 from base. Supplies a branch to Cowper's gland. 



Artery of corpus cavernosum : lies between crus penis and 

 pubic ramus. Enters crus and is distributed to corpus caver- 

 nosum. 



Dorsal artery of penis : lies between crus and pubic ramus, 

 through suspensory ligament, along dorsum of penis having 

 the median dorsal vein inside and the nerve outside. It ends 

 in the glans and prepuce. 



In the female : the vessel is smaller and has similar course 

 to that in male ; the superficial perineal supplies labia pudendi 

 The artery of bulb supplies bulbus vestibuli. The terminal 

 dorsal and corpus cavernosum arteries supply clitoris, being 

 named dorsalis and profunda clitoridis respectively. 



Sciatic : terminal branch of anterior trunk (vide Arteries of 

 Lower Limb, p. 89). 



Branches from Posterior Trunk : 



Gluteal : vide Arteries of Lower Limb (p. 90). 



Ilio-lumbar : passes upwards, backwards, and outwards 

 beneath psoas and obturator nerve, but anterior to lumbo- 

 sacral cord ; divides in iliac fossa into ascending or lumbar 

 branch, supplying psoas, quadratus lumborum, and giving a 

 spinal branch through foramen between 5th lumbar vertebra 

 and the sacrum. Transverse or iliac ramifies in iliacus, sup- 

 plies bone ; anas, lumbar, deep circumflex iliac. 



Lateral sacral (2) : Superior, the larger of the two dis- 

 tributed to upper part of sacrum, the Inferior to lower part of 

 sacrum and coccyx ; anas, middle sacral and opposite artery. 



Branches (dorsal) are given off, which enter anterior sacral 

 foramina for distribution on back of sacrum. 



THE EXTERNAL ILIAC ARTERY. 



Extent. From bifurcation of common iliac opposite lumbo- 

 sacral articulation to lower border of Poupart's ligament. 



Course. Lower of line from f inch below and little to left 

 of umbilicus, to point of Poupart's ligament midway between 

 symphysis pubis and anterior superior iliac spine. 



Relations. Covered by peritoneum and sub-peritoneal fat, 

 crossed by ureter and deep circumflex iliac vein, on the 

 right by ileum, left by iliac colon. The spermatic vessels 

 and genito-crural nerve lie on it for a short distance. 



