Final answer:
Vertebrae C1 to C7 make up the cervical region of the vertebral column. In descending order from the head, the regions of the vertebral column are cervical, thoracic, lumbar, sacral, and coccygeal. The C1 to C7 vertebrae are the highest up and contribute to the neck's structure.
Step-by-step explanation:
The vertebrae labeled C1 to C7 are part of the cervical region of the vertebral column. This means the correct answer to the question is option 1) Cervical.
The vertebral column is subdivided into distinct regions with the cervical vertebrae being the uppermost. As we progress down the spine, the sequence of vertebral regions from the closest to the head to the farthest from the head is: cervical; thoracic; lumbar; sacral; coccygeal.
The cervical region comprises of seven vertebrae (C1-C7), directly below which is the thoracic region with twelve vertebrae (T1-T12), followed by the lumbar region with five vertebrae (L1-L5).
The sacrum is formed from the fusion of five sacral vertebrae and comes next in line after the lumbar region. Lastly, the coccyx, or the tailbone, is formed from the fusion of four coccygeal vertebrae and is the final section of the vertebral column.