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The stroke volume for each ventricle is the same. Where the blood goes is the big comparative difference. Blood being pumped by the right ventricle (your right, the directions are reversed if you are looking at another person) is deoxygenated, so it is sent to the lungs, where the carbon dioxide it is carrying is exchanged for a fresh load of oxygen. The blood returns to the heart, where it enters the left atrium (top receiving chamber), which sends it into the left ventricle via a heart valve. When the left ventricle contracts, it is sending freshly oxygenated blood to the rest of the body. This blood will deliver oxygen and other life-giving nutrients to every cell in your body and also pick up the "trash" the waste components produced by the cells in your body. The major waste components are carbon dioxide and water. The carbon dioxide, as mentioned earlier is taken to the lungs, where it is exhaled into the atmosphere.
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