K H FUNG / SCIENCE PHOTO LIBRARY K H FUNG / SCIENCE PHOTO LIBRARY
Major heart blood vessels, 3D coloured computed tomography (CT) angiogram. This is a posterior view (from behind). The blood vessels visible here include the superior vena cava (background, upper right) and the main pulmonary artery (centre left) and its branches into the lungs (upper left and upper right).
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