What are the first two cervical vertebrae called?

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Multiple Choice

What are the first two cervical vertebrae called?

Explanation:
The first two cervical vertebrae are called atlas and axis. The atlas sits directly under the skull and forms the joint that lets you nod up and down. The axis has a projecting piece called the dens (odontoid process) that fits into the atlas, creating a pivot that enables you to rotate your head from side to side. Together, these two vertebrae and their joints—the atlanto-occipital and atlantoaxial—give you the major head movements. The other options refer to movement or non-anatomical terms, not the names of these vertebrae.

The first two cervical vertebrae are called atlas and axis. The atlas sits directly under the skull and forms the joint that lets you nod up and down. The axis has a projecting piece called the dens (odontoid process) that fits into the atlas, creating a pivot that enables you to rotate your head from side to side. Together, these two vertebrae and their joints—the atlanto-occipital and atlantoaxial—give you the major head movements. The other options refer to movement or non-anatomical terms, not the names of these vertebrae.

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