THE DEEP VEINS OF THE LOWEE EXTKEMITY. 



987 



the inguinal ligament it enters the middle compartment of the femoral sheath, 

 through which it ascends to its termination, lying between the compartment for 

 the femoral artery on the lateral side and the femoral canal on the medial side. 



It usually contains two bicuspid valves one near its termination and the 

 other just proximal to the entrance of its profunda tributary. 



Tributaries. It receives tributaries which correspond with the branches of the 

 femoral artery and the larger of the two superficial veins of the lower extremity, viz., the 

 great saphenous vein, which enters the femoral vein where that vessel lies in the middle 



Femoral artery 

 Femoral vein 

 Femoral canal 



Superficial ex- 

 ternal pudendal 

 artery 



Deep external pudendal 

 artery 



enons vein 



Adductor longus 

 racilis 



FIG. 793. THE FEMORAL VESSELS IN THE FEMORAL TRIGONE. 



compartment of the femoral sheath, and, not uncommonly, it is joined by the medial and 

 lateral circumflex veins. 



Vena Iliaca Externa. The external iliac vein (Figs. 773, 774, and 777) is the 

 upward continuation of the femoral vein. It commences, on the medial side of the 

 termination of the external iliac artery, immediately posterior to the inguinal 

 ligament, and ascends, along the aperture of the pelvis minor, to a point opposite the 

 sacro-iliac joint, and at the level of the lumbo-sacral articulation, where it ends, 

 immediately behind the hypogastric artery, by joining the hypogastric vein to 

 form the common iliac vein. It lies, at first, on the medial side of the external 

 liac artery, but on a somewhat posterior plane, and then directly posterior to the 

 artery, whilst just before its termination it crosses the lateral side of the hypo- 



