342 



INTERNAL ILIAC ARTERY. 



two sides of the body. The right common iliac is in relation in front 

 with the peritoneum, and is crossed at its bifurcation by the ureter. 

 It is in relation posteriorly with the two common iliac veins, and ex- 

 ternally with the psoas magnus. The left is in relation in front with 

 the peritoneum, and is crossed by the rectum and superior haemorrhoi- 

 dal artery, and at its bifurcation by the ureter. It is in relation be- 

 hind with the left common iliac vein, and externally with the psoas 

 magnus. 



INTERNAL ILIAC ARTERY. 



The Internal Iliac Artery is a short trunk, varying in length from 

 an inch to two inches. It descends obliquely to a point opposite the 

 upper margin of the great sacro-ischiatic foramen, where it divides into 

 an anterior and a posterior trunk. 



Fig. 126.* 



* The distribution and branches of the iliac arteries. 1 . The aorta. 2. The 

 left common iliac artery. 3. The external iliac. 4. The epigastric artery. 

 5. The circumflexa ilii. 6. The internal iliac artery. 7. Its anterior trunk. 

 8. Its posterior trunk. 9. The umbilical artery giving off (10) the superior 

 vesical artery. After the origin of this branch, the umbilical artery becomes 

 converted into a fibrous cord the umbilical ligament. 11. The internal pudic 

 artery passing behind the spine of the ischium (12) and lesser sacro-ischiatic 

 ligament. 13. The middle haemorrhoidal artery. 14. The ischiatic artery, also 



issing behind the anterior sacro-ischiatic ligament to escape from the pelvis. 

 Its inferior vesical branch. 16. The ilio-lumbar, the first branch of the 



astenor trunk (8) ascending to inosculate with the circumflexa ilii artery (5) 

 and form an arch along the crest of the ilium. 17. The obturator artery. 18. 

 1 he lateral sacral. 19. The gluteal artery escaping from the pelvis through the 

 upper part of the great sacro-ischiatic foramen. 20. The sacra media. 21. 

 me right common iliac artery cut short. 22. The femoral artery. 



