224 



Arteria iliaca interna. 



A. 'fvoj. perns urethr. 



570. Course 



and Ramification 

 the Pelvis. 



of the Arteries of 



The internal iliac artery, Art. iliaca Interna s. liypogastrica, 

 extends from the bifurcation of the common iliac artery downwards 

 towards the great sacro-sciatic foramen, where it divides into two large 

 trunks, an anterior and a posterior, which supply the pelvic 

 viscera, gluteal region and the external genital organs. 



The posterior branches of the internal iliac artery are: 



a) The i 1 e o - 1 u m b a r, Art. ilco-luinbalis, which ascends beneath 

 the psoas muscle, and gives off the iliac branch for the M. iliacns, 

 and the lumbar branch for the AO7! psoas and quadratus lumborum. 



b) The lateral sacral, Arteriae sacrales later ales, a superior 

 larger and an inferior smaller for the MM. pyrlformis, levator ani and 

 coccygeus. Some of its branches pass through the anterior sacral foramina 

 to the termination of the spinal cord, others through the posterior 

 sacral foramina to the long muscles of the back. 



