Can someone explain the blood flow to the legs ending at the feet and the return of blood from legs to heart?

Question

Can someone explain the blood flow to the legs ending at the feet and the return of blood from legs to heart?

Answer 1

In brief, large arteries carry the blood to the limbs, and everywhere, and branch out all the way down to smaller and smaller vessels called capillaries.  They end all over everywhere.... surface of the skin, as well as deep in all the muscles--in the brain as well as in the kidney.  There is no cell anywhere of any organ that does not have at least part of its outer wall next to a capillary... anywhere in your body.  

It is in this critical area--the capillaries-- that oxygen is given to cells, and carbon dioxide given back to the red blood cells.  Then, all over those vessels, now called veins, carry it back to the heart to be recirculated to the lungs to begin the process again.  The legs, feet, liver, heart, hands, everywhere have this same system.... arteries big and small away from the heart, veins big and small carrying blood back.... and all the real action of gas exchange take take place in capillaries....

Answer 2

ladyren is absolutely correct.  There is just one thing that I want to add.  In the veins carrying the blood away from the capillaries, there are valves that open and close as the heart pumps.  This helps avoid back-flow since it is working against gravity.