K H FUNG / SCIENCE PHOTO LIBRARY K H FUNG / SCIENCE PHOTO LIBRARY
Human heart. Illustration based on a 3D computed tomography (CT) scan of a human heart (purple) with a red glow in the background. This view shows the major blood vessels bringing blood to and from the heart, as well as some of the branching pulmonary blood vessels that lead to the lungs. The heart is a hollow muscular organ that pumps blood to and from the lungs and around the body.
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