86 THE POCKET ANATOMY 



Collateral branches. None named, supplies peritoneum, 

 psoas, ureters, and lymphatics. One of the renal, lumbar or 

 ilio-lumbar vessels may come off from it. 



THE INTERNAL ILIAC ARTERY. 



Extent. From bifurcation of common iliac opposite lumbo- 

 sacral articulation to great sacro-sciatic notch, there dividing 

 into anterior and posterior trunks. i inches long. 



Relations : in front peritoneum, crossed by ureter, ileum on 

 right, pelvic colon on left : behind on inner border of psoas, 

 internal iliac vein, lumbo-sacral cord and sacrum. Note that 

 this artery lies inside parietal layer of pelvic fascia, which is 

 pierced by all the parietal branches, e.g., sciatic, gluteal. 



From the extremity a partly obliterated artery, the hypo- 

 gastric, extends forwards to "side of bladder, between the 

 layers of posterior^false ligament. In the foetus this vessel is 

 nearly as large as the common iliac, ascends the wall of 

 abdomen to umbilicus, passing thence to placenta ; after 

 birth the vessel becomes obliterated except i^ inches at com- 

 mencement. 



Branches from Anterior Trunk : 



Superior vesical : is the unobliterated part of hypogastric, 

 extending from sacro-sciatic notch in posterior false ligament 

 to side of bladder. 



Branches supplied to side and upper part of bladder, and to 

 ureter. 



Artery of vas defer ens : accompanies duct to anas, with sper- 

 matic. 



Middle vesical : supplies side of bladder. 



Inferior vesical : supplies base of bladder, side of prostate 

 and vesiculae seminales in the male. 



Middle hsemorrhoidal : supplies lower part of rectum and in 

 the female to vagina. May come off from inferior vesical ; 

 anas, superior haemorrhoidal of inferior mesenteric, inferior 

 haemorrhoidal of internal pudic. 



[Uterine : down to neck of uterus, passes inwards between 

 layers of broad ligament to supply body of viscus, where it 

 crosses the ureter superiorly and then divides into a large 

 ascending branch to fundus and ovary, anas, ovarian ; and 

 small descending branch to vagina, anas, vaginal. 



Vaginal : corresponds to inferior vesical in male, supplies 

 vagina, fundus of bladder, and lower part of rectum.] 



Obturator : directed to groove in upper part of thyroid 

 foramen, passing out of pelvis and dividing into two branches 



