The 3 main veins of the pelvis follow the course of the arteries and are named accordingly:Common iliac vein: Union of the external and internal iliac veins Joins with the corresponding common iliac vein to b
relaxation starts in the walls of auricles due to this deoxygenated blood rushes from veins to right auricle and oxygenated blood through pulmonary vein in to left auricle (Fig.