Which structure is crucial for the protection of the spinal cord?

The axial skeleton is crucial for the protection of the spinal cord because it comprises the vertebral column (spine), which directly encases and safeguards the spinal cord. The vertebrae are specifically designed to create a protective bony tunnel for the spinal cord, preventing injury from external forces.

In addition to this protective function, the axial skeleton provides structural support and maintains the overall posture of the body. The vertebrae also facilitate movement while ensuring that the spinal cord remains shielded from harm.

The other structures mentioned, such as the pelvis and the appendicular skeleton, play important roles in body movement and support but do not offer the same direct protective function for the spinal cord as the axial skeleton does. Long bones are primarily involved in support and movement, rather than providing protection specifically for the spinal cord.