Which flexible substance found in joints for cushioning?

Which flexible substance found in joints for cushioning?

• A. Arthritis
• B. Bones
• C. Ligaments
• D. Cartilage

Answer: (D)

Cartilage is the cushioning material in joints. At the ends of bones in a joint, articular cartilage provides a smooth, elastic surface that can deform slightly to absorb shock and reduce friction during movement. Its flexible, gel-like matrix, rich in water and proteoglycans, helps distribute loads evenly across the joint and protects bones from wear.

Arthritis is a disease process involving inflammation of a joint, not a cushioning substance. Bones are rigid structures that give shape and support. Ligaments are connective tissues that stabilize joints by connecting bone to bone; they guide movement rather than cushion it. Because cartilage uniquely provides that smooth, resilient padding essential for joint cushioning, it’s the correct choice.