HENNING DALHOFF / SCIENCE PHOTO LIBRARY HENNING DALHOFF / SCIENCE PHOTO LIBRARY
Healthy spine, computer artwork. The spine is a column of cylindrical bones called vertebrae that support the trunk and head and protect the spinal cord. The spinal cord passes through the hole seen in the view at right. Between the vertebrae are intervertebral discs (purple) that allow a degree of flexibility and cushion the vertebrae during movement. Each vertebra has bony projections which provide attachment sites for the muscles and ligaments that hold the spine together.
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