The structural classification term for diarthrotic (freely moveable) joints is what?

The structural classification term for diarthrotic (freely moveable) joints is what?

• A. Fibrous
• B. Cartilaginous
• C. Bony
• D. Synovial

Answer: (D)

Freely moveable joints are called synovial joints. They have a joint cavity lined by a synovial membrane, an articular capsule, and cartilage covering the ends of the bones, with synovial fluid providing lubrication. This setup allows a wide range of motion and is reinforced by ligaments, sometimes with additional structures like menisci or bursae to aid movement and stability. Examples include the knee, elbow, shoulder, and hip. Other joint types—fibrous joints bound by dense connective tissue with little or no movement, cartilaginous joints that permit only limited motion, and bony joints where bones fuse—do not provide the same degree of mobility.

Freely moveable joints are called synovial joints. They have a joint cavity lined by a synovial membrane, an articular capsule, and cartilage covering the ends of the bones, with synovial fluid providing lubrication. This setup allows a wide range of motion and is reinforced by ligaments, sometimes with additional structures like menisci or bursae to aid movement and stability. Examples include the knee, elbow, shoulder, and hip. Other joint types—fibrous joints bound by dense connective tissue with little or no movement, cartilaginous joints that permit only limited motion, and bony joints where bones fuse—do not provide the same degree of mobility.