The bones (purple) are also seen on the X-ray, aiding identification of the arteries. The ribs of the chest are seen from the front. The head has been turned to one side to expose the right-hand side of the neck and its carotid arteries (internal and external). These bring oxygenated blood to the head.
The right arm has been raised to show how the subclavian artery passes under the collar bone (clavicle) and into the arm. The arteries carry oxygenated blood from the heart (not seen). The arteries have been highlighted by arteriography: injecting them with a radio-opaque medium to absorb the X-rays.
Credits: CNRI/Science Photo Library
Source: Corina Marinescu
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