Trace a red blood cell from the ascending aorta?

Starting at the ascending aorta, the red blood cell will travel to the arch, the descending aorta the abdominal portion of the aorta to the left common iliac artery, the left external iliac artery to the femoral artery. At this point, there are many paths the erythrocyte may take since there is an anastomosis at the level of the knee. The path most likely taken is descending genicular artery which anastomoses directly by way of the articular branches. But it may also travel along the medial or lateral superior genicular arteries or via the posterior tibial recurrent artery, a branch of the popliteal artery or via the sural artery. Since this anastomosis is often variable in some individuals, it may not be clear which is the best way to get to the capillary bed in a particular individual. The return route will be via the left great saphenous vein to the left femoral vein, ping to the left external and common iliac veins before reaching the inferior vena cava. There it will procede to the right atrium and back to the heart.