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.

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.