ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Heart. Coloured 3D computed tomography (CT) scan of an oblique view of the heart and its blood vessels. The large cream structures at upper centre above the heart's main chamber (red) are the blood vessels that carry blood to and from the heart. The heart is a hollow muscular organ that pumps blood around the body. The fine blood vessels covering the chamber (left, lower centre and right) are coronary arteries, which supply the heart muscle itself with oxygenated blood.
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