Show THE OLD prospector SAYS dear editor the other day a child asked aske me e how does the blood get from the feet back to the hearte this kinda got me so I 1 had to look it up it is easy to understand how the blood gets from the heart to the feet the pumping heart sends it on its way what s more it runs downhill getting back to the heart must be quite a problem for the blood must run uphill most of the time but it makes the round trip very well blood is carried back to the heart by veins these blood vessels have many little built in valves these valves prevent the blood from flow ing away from the heart they help to keep it traveling in the right dr action the branching of the veins also help to push the blood back to the heart the return trip starts a fine mesh of tiny blood vessels these fine veins join together to form lar ger veins this joining up of little streams helps speed up the flow at the same time the heart is still pumping out fresh blood this shoves at the returning blood from behind so the wonderful body corn bines three tricks to keep the used blood flowing back to the he heart art to gether they are strong enough to keep the used blood flowing uphill even from the toes yours truly THE OLD prospector |