JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Arterial system. Illustration of the arterial system in the human body, shown in a standing figure. The heart and kidneys are also shown. Arteries are the blood vessels that carry oxygen-rich blood to the body's tissues. Veins (not shown) carry blood back to the heart. The average adult has about 5 litres of blood. At rest this volume of blood passes through the heart each minute.
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