FRIEDRICH SAURER / SCIENCE PHOTO LIBRARY FRIEDRICH SAURER / SCIENCE PHOTO LIBRARY
Human backbone, skull and pelvis. Computer artwork of the spine (the backbone or spinal column), seen from an oblique sideways angle, with the front of the spine at left, the skull at top, and the pelvis at bottom. The spine runs from the skull to the pelvis. It is a flexible column of small compact bones called vertebrae, that enclose and protect the spinal cord. The vertebrae are separated by discs of fibrocartilage (intervertebral discs, red). In an adult, there are 26 vertebrae.
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