K H FUNG / SCIENCE PHOTO LIBRARY K H FUNG / SCIENCE PHOTO LIBRARY
Aortic valve. Coloured 3D computed tomography (CT) scan looking from the ascending aorta down to the aortic valve, the opening from the heart to the aorta. The aorta is the body's main artery, through which blood is pumped from the heart around the body. Also visible is one of the openings leading to a coronary artery, one of the small arteries supplying the heart itself with blood.
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