Each capsule consists of two layers or membranes: • an outer (
fibrous membrane,
fibrous stratum) composed of avascular white fibrous tissue • an inner (
synovial membrane,
synovial stratum) which is a secreting layer On the inside of the capsule, articular cartilage covers the end surfaces of the bones that articulate within that joint. The outer layer is highly innervated by the same nerves which perforate through the adjacent muscles associated with the joint. ==Fibrous membrane==