Synovial Joints - Characteristics

The following are characteristic of synovial joints:

1. Joint Cavity - The space between articulating bones that is lined with the synovial membrane. The joint capsule surrounding the joint cavity provides support for the delicate synovial membrane where it is not in contact with bone.
2. Synovial Membrane Lining - This structure secretes synovial fluid which lubricates and nourishes the joint. (Syn=like, ovial=egg-white)
3. Articular Cartilage - This covers the ends of bones that articulate with each other. It consists of hyaline cartilage lubricated with synovial fluid. It is very slick and smooth to reduce friction in the joint.
4. Accessory Structures - These do not necessarily appear in all synovial joints, but play key roles when they are present. We will discuss these structures more in the next screen.