BSIP VEM / SCIENCE PHOTO LIBRARY BSIP VEM / SCIENCE PHOTO LIBRARY
Blood system. Illustration of a standing human figure revealing the blood circulation system. The heart, in the upper chest, is a hollow muscle that pumps blood around the body. At the top of the heart are the heart's main blood vessels. On the right side of the body are the veins (blue) which carry deoxygenated blood towards the heart. The arteries (red), on the left side of the body, carry oxygenated blood away from the heart. To the left and right of the heart are the blood vessels of the lungs.
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