MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY
Major organs blood supply. Computer illustration showing the blood supply serving the major organs of the body. Oxygen is added to the blood (oxygenated blood, red) in the lungs (top) and pumped by the heart (upper centre-left) to the body's organs. De-oxygenated blood (blue) carries carbon dioxide from the organs via the heart and back to the lungs.
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