Coloured 3D computed tomography (CT) scan of a healthy heart and lungs. The heart (centre right) is a hollow sac of muscular tissue that pumps oxygenated blood around the body and deoxygenated blood to the lungs. The lungs (black) are either side of the heart. They are the site of gaseous exchange, where carbon dioxide is removed from the blood and oxygen added.

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Photo credit: © VSEVOLOD ZVIRYK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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