Final answer:
The synovial membrane is a connective tissue membrane that produces synovial fluid to lubricate synovial joints, allowing for smooth bone movements.
Step-by-step explanation:
The synovial membrane is a special type of connective tissue membrane that lines the cavity of synovial joints, which are the most common type of joints in the human body. This membrane is essential for joint function as it secretes synovial fluid, a thick, lubricating fluid that reduces friction between the articulating surfaces of bones, enabling smooth movement. It also provides nourishment to the articular cartilage, which lacks a blood supply.