What is identified by the illustration of cervical vertebrae?

The illustration of cervical vertebrae specifically depicts the seven vertebrae located in the neck region of the spinal column, commonly referred to as C1 through C7. These vertebrae have unique features that distinguish them from vertebrae found in other regions of the spine, such as the thoracic, lumbar, and sacral regions.

Cervical vertebrae are characterized by smaller bodies compared to other vertebrae, which allows for greater mobility in the neck. They also possess transverse foramina, which are openings that allow for the passage of the vertebral arteries that supply blood to the brain. Additionally, the first cervical vertebra, known as the atlas, supports the skull and allows for the nodding motion of the head, while the second cervical vertebra, known as the axis, enables the rotation of the head.

In contrast, thoracic vertebrae are larger and are associated with the ribcage; lumbar vertebrae are even larger and designed for weight-bearing and stability; sacral vertebrae are fused into one structure and form part of the pelvis. Therefore, the correct identification of cervical vertebrae is clearly represented by the illustration being referenced.