What tissue lines the joint capsules where bones meet?

• A. Cartilage lines joint capsules where bone meets bone
• B. Periosteum lines joint capsules
• C. Medullary marrow lines joint capsules
• D. Fibrous tissue forms the joint surface

Answer: (D)

The lining inside a joint capsule is the synovial membrane. This specialized connective tissue produces synovial fluid that lubricates the joint. The surfaces of the bones that meet at the joint are covered by articular cartilage, not the capsule lining. The outer part of the capsule is fibrous tissue that provides strength, while periosteum covers the outer bone surface and the medullary cavity contains bone marrow. So, the tissue that lines the joint capsule itself is the synovial membrane.