SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Spinal cord. Coloured myelogram (spinal cord X- ray) of a healthy human spinal cord (white) in the lower (lumbar) back. It is seen from the side (left) and front (right). The vertebrae (spinal bones, orange) protect and support the spinal cord. At the base of the vertebral column is the sacrum, the bone that links the vertebrae to the pelvis. The spinal cord is part of the central nervous system (CNS), and is an extension of the brain. Spinal nerves (faintly seen) branch from it, allowing information to be passed between the brain and body. Myelography is an X-ray technique in which a contrast medium is injected into the fluid- filled space that cushions the spinal cord.
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