What is the primary function of the intervertebral cartilage?

The primary function of intervertebral cartilage, specifically the intervertebral discs, is to absorb shock and reduce friction between the vertebrae in the spine. These discs act as cushions that help to maintain the structural integrity of the spine while allowing for flexibility and movement. They are composed of a tough outer ring called the annulus fibrosus and a gel-like center known as the nucleus pulposus. This unique structure enables the discs to withstand compressive forces during activities such as walking, jumping, or lifting, effectively absorbing impact and minimizing stress on the spinal column.

While the intervertebral discs do contribute indirectly to the protection of the spinal cord by maintaining proper spacing and alignment of the vertebrae, their primary role remains in shock absorption and reducing friction. The other options, such as connecting muscles to bones or providing nutrients to vertebrae, do not accurately describe the specific functions of intervertebral cartilage. These roles are fulfilled by other anatomical structures such as tendons and blood vessels, highlighting the distinct responsibilities that different components of the musculoskeletal system hold.