Answer
The articulating bones in the synovial joint are separated by a cavity called the joint cavity. This cavity is filled by a lubricating liquid called synovial fluid, secreted by synovial membrane. In a joint with osteoarthritis, the synovial membrane is degraded, causing the synovial fluid to leak out. Due to this, the friction between articulating bones increases and causes pain.
Work Step by Step
Same as above.
