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axis
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axis

vertebra
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Quick Summary

The axis is the second vertebra in the neck, located below the atlas. It is characterized by a toothlike projection called the odontoid process, which extends upward from its anterior end. This process allows the atlas vertebra to rotate, enabling the head to turn from side to side. The vertebral column, composed of vertebrae, protects the spinal cord and provides body support. The atlas and axis are the top two cervical vertebrae, forming a freely movable joint with the skull.12

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  1. odontoid process
  2. vertebral column

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