Which cervical vertebra is known as the axis?

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Multiple Choice

Which cervical vertebra is known as the axis?

Explanation:
The axis refers to the second cervical vertebra, distinguished by its dens (odontoid process). That upward projection acts as a pivot within the atlas (the first cervical vertebra), forming the atlantoaxial joint that enables rotation of the head from side to side. The atlas sits on top and supports the skull, while the axis provides the rotational mechanism through the dens. Other cervical vertebrae don’t have this dens and thus don’t serve as the axis.

The axis refers to the second cervical vertebra, distinguished by its dens (odontoid process). That upward projection acts as a pivot within the atlas (the first cervical vertebra), forming the atlantoaxial joint that enables rotation of the head from side to side. The atlas sits on top and supports the skull, while the axis provides the rotational mechanism through the dens. Other cervical vertebrae don’t have this dens and thus don’t serve as the axis.

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