When stretching, a lubricant called synovial fluid is released from
the joint cavity.
Synovial fluid: it is secreted by the synovial membrane and fills
the joint cavity; it provides lubrication to the joint, reduces bone erosion and aids in joint mobility.
Joints are made up of
a joint cavity filled with synovial fluid, a synovial membrane, and particular cartilage.
Joints, responsible for movement, are made up of
a joint cavity filled with synovial fluid, a synovial membrane, and cartilage.