566 



THE ARTERIES 



(3) THE IXTERXAL ILIAC ARTERY 



The internal iliac artery arises at the bifurcation of the coniiiion ihae opposite 

 the hmibo-sacral articulation. It descends into the pelvis for al>out an incli and a 

 quarter (3 cm.), and then divides, opposite the upper margin of the great sacro- 

 • sciatic foramen, into an anterior and a posterior brancli. 



Fig. .368. — Side View of Pelvis axd Upper Third of Thigh, with the External 

 Iliac, Ixterxal Iliac, axd Femoral Arteries axd their Branches, Left Side. 



(From a dissection by W. J. Walsliani iu tlie Museum of St. Bartholomew's Hospital.) 



The bladder is hooked over to expose back of pelvis. 



Common iliac arlcry 

 SYMPATHETIC yERVE 

 Middle sacral artery 



Common iliac lein 



URETER 



Internal itiac aitery 



External iliac i em 



Exttrnal iliac ai t> i v 

 Posterior branch of internnl lUac diudiiic/ into 

 gluteal and ilio-himlar arteries 



Latnal iucial mlf 

 SACRAL PLEXUS 

 OBTURATOR XER^ E 

 Ohttiratoi ailuy 

 Obliterated hypogastric 

 Superior vesical artery 

 £!dge of levator ani 



Pudic artery 



BLADDER 



Middle vesical artery 



Deep epigastric artery 

 Pubic branclt of epi- 

 gastric artery 

 Common femoral artery — 



Long snphenovs rein — 

 PeetineuB ruusele 



ObtHialni lilt 



Adductor magnua 



Internal cii c iimfli r ai I i u 



Adductor brevia 



OBTURATOR XERVE (ant. hrnnch) 



Profunda artery 



Adductor longus, hooked aside 



Superficial femoral artery and rein 



Gracilis muscle 

 Lower part of sartorius 



Psoaa muscle 



Ilio-lumbar artery 



EA'TERXAL CUTA- 

 XEOUS XERVE 



Iliacus muscle 



GEXITO-CRURAL 

 XERVE 



AXTERIOR CRU- 

 RAL XERVE 



Deep circiinifiex iliac 



artery 

 Superficial circumflex 



iliac artery 

 AXTERIOR CRVRAL X. 

 Gluteal artery and 



stiperior gluteal iteri'e 

 Tensor faciae temoris 



t hooked asidei 

 Gluteus raedius and 



minimus 

 Sartorius muscle 

 MIDDLE <UTA- 

 XEO US XERVE 



XERVE TO RECTUS 



XERVE TO VASTVS 



E-YTERXl'S 

 Eilernal circuiiifiex nr. 

 XERVE TO CRfREfS 

 Rectus, hooked aside 



Profuiiit.i cti,, 



LOXti SAPHEXOUS 

 XERVE AXD 

 NERVE TO VAS- 

 TUS IXTERXUS 



Relations. — Behind, it rests on the termination of the external iliac vein, the 

 internal iliac vein, the inner margin of the psoas muscle, the luml)0-sacral cord, the 

 obturator nerve, and the sacrum. 



In front it is covered by the peritoneum, and is crossed by tbc ureter. 



In the adult the internal iliac is smaller than the external iliac; but in the foetus 

 the internal is much larger than the external, and is, together with its anterior 

 branch, the vessel by which the Idood is returned to the placenta. In early fa^tal 



