208 ANATOMY AND PHYSIOLOGY 



The right and left common iliac veins unite to form the 

 inferior vena cava (Fig. 134). 



The Inferior Vena Cava 



This is formed by the union of the two common iliac veins at 

 the right side of the bifurcation of the abdominal aorta (p. 197) 



FIG. 146. SCHEME OF FORMATION OF PORTAL VEIN, BY VEINS FROM SPLEEN, 

 STOMACH AND INTESTINES. 



(level of the lower border of the fourth lumbar vertebra). It runs 

 upward through the abdomen, on the right side of the aorta, 



