The structure that encloses a joint and retains synovial fluid is known as the?

The structure that encloses a joint and retains synovial fluid is known as the?

• A. Joint capsule
• B. Synovial membrane
• C. Ligament
• D. Bursa

Answer: (A)

The joint capsule is the structure that encloses a joint and keeps the synovial fluid inside the joint cavity. It has two parts: the fibrous outer layer that gives strength and stability, and the inner synovial membrane that lines the cavity and produces synovial fluid to lubricate and nourish the cartilage. This sealed capsule creates the contained space where the fluid can act during movement. The synovial membrane alone lines the inside but doesn’t form the enclosing capsule by itself. A ligament stabilizes joints between bones, not enclose them, and a bursa is a separate fluid-filled sac that reduces friction, not the joint enclosure.

The joint capsule is the structure that encloses a joint and keeps the synovial fluid inside the joint cavity. It has two parts: the fibrous outer layer that gives strength and stability, and the inner synovial membrane that lines the cavity and produces synovial fluid to lubricate and nourish the cartilage. This sealed capsule creates the contained space where the fluid can act during movement. The synovial membrane alone lines the inside but doesn’t form the enclosing capsule by itself. A ligament stabilizes joints between bones, not enclose them, and a bursa is a separate fluid-filled sac that reduces friction, not the joint enclosure.