OMIKRON / SCIENCE PHOTO LIBRARY OMIKRON / SCIENCE PHOTO LIBRARY
Colored angiogram of iliac arteries. The aorta, the body's main artery, is at the top. It carries oxygenated blood from the heart to the rest of the body. In the abdomen the aorta branches into the two common iliac arteries, which then further divide into the internal and external iliac arteries at bottom right and left. The internal iliac artery supplies blood to the viscera and walls of the pelvis, while the external iliac artery supplies the legs. Angiography uses an injected contrast material to show blood vessels on an X-ray.
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