Final answer:
The five sections of the vertebral column are Cervical (7), Thoracic (12), Lumbar (5), Sacral (5 fused), and Coccygeal (3-5 fused), making option (a) the correct answer.
Step-by-step explanation:
The five sections of the vertebral column from top to bottom and the number of vertebrae in each are:
- Cervical region with 7 vertebrae.
- Thoracic region with 12 vertebrae.
- Lumbar region with 5 vertebrae.
- Sacral region with 5 fused vertebrae.
- Coccygeal region with 3-5 fused vertebrae.
Therefore, the correct answer is (a) Cervical (7), Thoracic (12), Lumbar (5), Sacral (5 fused), Coccygeal (3-5 fused).
The vertebral column is essential for protection of the spinal cord, structural support, and flexibility of the torso, with special regions responsible for particular types of movement and bearing loads.