These are usually surrounded by a dense connective tissue capsule, which was cut in order to see inside the joint. Articular cartilage is hyaline cartilage that faces the synovial cavity on one side and attaches to subchondral bone on the other. Its main function is to absorb shock. Hyaline cartilage is avascular, therefore it receives its nutrients from the synovial fluid.
Synovial cavity contains synovial fluid and the synovium .
The synovium is a collagenous membrane that produces the fluid. The fluid fills the cavity, reducing friction between the two articulating surfaces of the joint. Subchondral bone is continuous with the articular cartilage on one side. It directly connects to trabeculae that penetrate deep into the spongy bone matrix.