What cervical vertebrae is unique because it does not have a body?

The cervical vertebra that is unique because it does not have a body is the first cervical vertebra, known as the atlas. The atlas supports the skull and allows for nodding movements of the head. Its distinctive structure includes a ring-like formation with lateral masses, which enables it to articulate with the occipital condyles of the skull. This design is crucial for the flexibility and range of motion of the neck.