380 



INFERIOR VENA CAVA, WITH ITS FORMATIVE BRANCHES. 



Fig. 135. 



Iliac Veins. 



The External iliac vein lies to 

 the inner side of the correspond- 

 ing artery at the os pubis ; but 

 gradually gets behind it as it 

 passes upwards along the brim 

 of the pelvis, and terminates 

 opposite the sacro-iliac syrn- 

 physis by uniting with the in- 

 ternal iliac, to form the common 

 iliac vein. Immediately above 

 Poupart's ligament it receives 

 the epigastric and circumflexa 

 ilii veins ; it has no valves. 



The Internal iliac vein is 

 formed by vessels which cor- 

 respond with the branches of 

 the internal iliac artery ; it re- 

 ceives the returning blood from 

 the gluteal, ischiatic. internal 

 pudic, and obturator veins, ex- 

 ternally to the pelvis ; and from 

 the vesical and uterine plexuses 

 within the pelvis. The vein 

 lies to the inner side of the in- 

 ternal iliac artery, and termi- 

 nates by uniting with the ex- 

 ternal iliac vein, to form the 

 common iliac. 



The Vesical and prostatic 

 plexus is an important plexus 

 of veins which surrounds the 

 neck and base of the bladder 

 and prostate gland, and receives 

 its blood from the great dorsal 

 vein of the penis, and from the 

 veins of the external organs of 

 generation. It is retained in 

 connection with the sides of the 

 bladder by a reflexion of the 

 pelvic fascia. 



* The veins of the trunk and neck. 1. The superior vena cava. 2. The left 

 vena innominate. 3. The right vena innominata. 4. The right subclavian 

 vein. 5. The internal jugular vein. 6. The external jugular. 7. The anterior 

 jugular. 8. The inferior vena cava. 9. The external iliac vein. 10. The in- 



