Ossification of Axis
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The axis is ossified from five primary and two secondary centers. The body and vertebral arch are ossified in the same manner as the corresponding parts in the other vertebrae, viz., one center for the body, and two for the vertebral arch. The centers for the arch appear about the seventh or eighth week of fetal life, while the centers for the body appear in about the fourth or fifth month. The dens or odontoid process consists originally of a continuation upward of…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The axis is ossified from five primary and two secondary centers. The body and vertebral arch are ossified in the same manner as the corresponding parts in the other vertebrae, viz., one center for the body, and two for the vertebral arch. The centers for the arch appear about the seventh or eighth week of fetal life, while the centers for the body appear in about the fourth or fifth month. The dens or odontoid process consists originally of a continuation upward of the cartilaginous mass, in which the lower part of the body is formed.