Which statement correctly identifies moveable joints?

• A. Fibrous joints are moveable
• B. Cartilaginous joints are moveable
• C. Synovial joints are moveable
• D. The skull bones are moveable

Answer: (C)

Moveable joints are those that allow a significant range of motion, and this mobility comes from the synovial joint structure. A synovial joint features a joint cavity filled with synovial fluid, articular cartilage covering the bone ends, a fibrous capsule, and ligaments. This setup reduces friction and enables movement in multiple directions, making synovial joints the most mobile type (diarthroses). Therefore, identifying moveable joints as synovial joints is the best answer. In contrast, fibrous joints (like skull sutures) are usually immovable or only slightly movable, and cartilaginous joints can be immovable or only slightly movable, not as freely movable as synovial joints. The skull bones themselves are fused fibrous joints in adults, so they are not moveable.