Heart anatomy, artwork. The heart is a hollow muscle that pumps blood around the body. Deoxygenated blood from the body is carried into the right side of the heart (left) via the vena cava (blue, left). From here, the blood travels into the lungs via the pulmonary artery (blue, right), where it is oxygenated. The blood is then carried into the left side of the heart (right) before travelling back into the body via the aorta (red, top), where it can exchange oxygen for carbon dioxide and start the cycle all over again. The blood vessels on the surface of the heart supply it with oxygen (red) and take away its waste products (blue).
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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