The first cervical vertebra is

• A. Axis
• B. Atlas
• C. Lumbar
• D. Sacral

The first cervical vertebra is known as the Atlas. This vertebra is crucial as it supports the skull and allows for the nodding motion of the head.

Understanding the Cervical Vertebrae

The cervical spine consists of seven vertebrae, labeled C1 to C7. Each has a unique role in supporting the head and facilitating movement.

Key Features of the Atlas

• Location: It is the topmost vertebra in the cervical spine.
• Function: The Atlas allows for the rotation and tilting of the head.
• Structure: Unlike other vertebrae, it lacks a body and spinous process, which contributes to its unique shape.

In summary, the correct answer is B. Atlas, as it is the first cervical vertebra in the human body.