MIRIAM MASLO / SCIENCE PHOTO LIBRARY MIRIAM MASLO / SCIENCE PHOTO LIBRARY
Healthy lower back, coloured X-ray. The spine runs down centre. It is made up of vertebrae, block- shaped bones that support and protect the spinal cord (not seen). At its base, the spine is joined to the pelvis (lower frame), which supports the weight of the upper body. In the chest, the vertebrae connect to the ribs (some seen at top).
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