What is the primary function of cartilage in the skeletal system?

The primary function of cartilage in the skeletal system is to protect bones from friction. Cartilage is a smooth, flexible connective tissue that covers the ends of bones at the joints, allowing them to glide over each other with minimal friction during movement. This protective role is crucial because it helps reduce wear and tear on the bones, prevents pain during motion, and contributes to the overall smooth functioning of the skeletal system.

In addition to preventing friction, cartilage also absorbs shock and provides cushioning, which helps maintain joint integrity and function. Its unique structure enables it to resist compression and support dynamic movement, making it essential for joint health.

The other choices do not accurately reflect the primary function of cartilage. Muscle contractions are supported by tendons, not cartilage; blood flow in bones is primarily facilitated by vascular structures within the bone tissue; and while cartilage does play a role in the structure of joints, it does not connect muscles to joints, as that role belongs to tendons.