Which statement about the articular capsule is accurate?

Which statement about the articular capsule is accurate?

• A. The capsule is a single-layer structure
• B. The inner layer produces synovial fluid
• C. The outer layer blends with the periosteum
• D. The capsule has two layers, with the inner layer lining the joint and the outer layer blending with periosteum

Answer: (D)

The articular capsule is a two-layer enclosing covering for a joint, built for both stability and lubrication. The outer fibrous layer blends with the periosteum of the adjoining bones, anchoring the capsule and contributing to joint stability. The inner layer is the synovial membrane that lines the inside of the capsule and the joint cavity; it produces synovial fluid, which lubricates the moving surfaces and nourishes the cartilage. Because this description accurately captures both the two-layer structure and how each layer functions, it is the most complete and correct way to understand the capsule. The single-layer idea is incorrect, and while the inner layer does produce synovial fluid, the statement that emphasizes the two-layer arrangement and their relationships is the best fit.

The articular capsule is a two-layer enclosing covering for a joint, built for both stability and lubrication. The outer fibrous layer blends with the periosteum of the adjoining bones, anchoring the capsule and contributing to joint stability. The inner layer is the synovial membrane that lines the inside of the capsule and the joint cavity; it produces synovial fluid, which lubricates the moving surfaces and nourishes the cartilage. Because this description accurately captures both the two-layer structure and how each layer functions, it is the most complete and correct way to understand the capsule. The single-layer idea is incorrect, and while the inner layer does produce synovial fluid, the statement that emphasizes the two-layer arrangement and their relationships is the best fit.