SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Upper spine. Coloured magnetic resonance imaging (MRI) sagittal scan of a healthy upper spine. The cervical (neck) and thoracic (chest) spine is shown. The base of the brain, the brainstem (top centre), extends down into the spinal cord (solid blue line), which contains nerve fibres surrounded by cerebrospinal fluid. To the left of the spinal cord are the vertebrae (blocks), the bones of the vertebral column that protect the spinal cord. The rear diagonal protrubences of the bones are seen as white lines to the right of the spinal cord. Also seen is the trachea (windpipe, black tube, left) and the layer of fat underneath the skin of the back (white, right).
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