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. This view shows the major blood vessels bringing blood to and from the heart, as well as the branching pulmonary blood vessels in 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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