Coccyx

There are the four vertebrae of the coccyx, or tailbone.1

Source: NICHD (NIH)1

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Coccyx: The last bone in the Vertebral Column in tailless primates considered to be a vestigial tail-bone consisting of three to five fused Vertebrae.2

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References

  1. Source: NICHD (NIH): nichd.nih.gov/ health/ topics/ spinalinjury/ conditioninfo/ Pages/ default.aspx
  2. Source: MeSH (U.S. National Library of Medicine)

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