http://en.wikipedia.org/wiki/Human_vertebral_column
Development
The striking segmented pattern of the spine is established during embryogenesis when somites, are rhythmically added to the posterior of the embryo. Somite formation begins around the third week when the embryo begins gastrulation and continues until around 52 somites are formed.
Development
The striking segmented pattern of the spine is established during embryogenesis when somites, are rhythmically added to the posterior of the embryo. Somite formation begins around the third week when the embryo begins gastrulation and continues until around 52 somites are formed.
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