Which term describes the tissue that reduces friction at joints due to a smooth surface?

Which term describes the tissue that reduces friction at joints due to a smooth surface?

• A. Cartilage
• B. Ligament
• C. Bone Marrow
• D. Spongy Bone

Answer: (A)

When joints move, a smooth, low-friction surface is required to allow easy movement and reduce wear. This role is filled by cartilage that covers the ends of bones in synovial joints, forming articular cartilage. Its smooth, resilient surface lets bones slide past one another with minimal resistance and helps absorb some load during movement. Ligaments connect bones and stabilize joints but don’t provide a lubricated surface. Bone marrow is inside bones and produces blood cells, not a friction-reducing surface. Spongy bone is the porous inner portion that supports the bone and houses marrow, not the smooth surface at the joint. So the tissue described is cartilage.

When joints move, a smooth, low-friction surface is required to allow easy movement and reduce wear. This role is filled by cartilage that covers the ends of bones in synovial joints, forming articular cartilage. Its smooth, resilient surface lets bones slide past one another with minimal resistance and helps absorb some load during movement. Ligaments connect bones and stabilize joints but don’t provide a lubricated surface. Bone marrow is inside bones and produces blood cells, not a friction-reducing surface. Spongy bone is the porous inner portion that supports the bone and houses marrow, not the smooth surface at the joint. So the tissue described is cartilage.