JOHN DAUGHERTY / SCIENCE PHOTO LIBRARY JOHN DAUGHERTY / SCIENCE PHOTO LIBRARY
Back anatomy. Illustration of the anatomy of the neck, shoulders and back, showing important muscles (brown), bones (white), nerves (yellow) and blood vessels (red/blue). The nerve network seen at upper right is the right brachial plexus, where nerves run from the cervical (neck) part of the spine into the arm, shoulder and chest. The backbone (centre) runs down from the skull (top centre) to the pelvis, where it ends in four fused vertebrae called the coccyx (lower centre). The large red blood vessel seen in the left hand side of the neck is one of the carotid arteries. The large red blood vessel entering the left arm is one of the subclavian arteries.
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