human have got closed blood circulation system n is double circulation ,veins carry deoygenated blood 4rm tissues to heart n arteries carries d oxygenated blood 2 cells n tissues...d herat exert...
I think that your blood circulates to keep you alive first of all and to keep the rest of your body energized. If your blood stayed in one place I think it would be a blood clot.
The heart is the only thing that propels the blood through the whole body. It works like a pump, sucking blood in, and then expelling it in the vast network of veins and arteries running from your...
blood is take in in the veins through the atrium to the ventricle, flip to the other side, up the atrium through the aorta, around the body, to the arioes in the lung (to get o2) and repeated