WAT IS A JOINT?
A joint is the connection between two bones. It allows smooth movement.
Three types of joints are distinguished, depending on their mobility:
- Mobile joints that allow large movements (knee, ankle, shoulder, elbow, hip, etc.)
- Semi-mobile joints that allow small movements (like the ones joining the vertebrae).
- Immobile joints that do not allow any movement (like those connecting the bones of the skull).
HEALTHY MOBILE JOINTS
- Joint cartilage : cartilage is a smooth, white, non-vascularized tissue that covers and protects the bone ends of all joints. It forms an elastic pad that allows joints to absorb shock while we move.
- The joint capsule : the joint capsule surrounds and defines the joints.
- The synovial membrane : the synovial membrane covers the inner face of the joint capsule. It nourishes and lubricates the joint surfaces by producing synovial fluid.