Label the structures in the following illustration of a synovial joint.

Verified step by step guidance

1. Identify the outermost layer surrounding the joint, which is the fibrous capsule. This structure provides stability and protection to the joint.
2. Locate the synovial membrane lining the inner surface of the fibrous capsule. This membrane produces synovial fluid that lubricates the joint.
3. Find the synovial fluid within the joint cavity, which reduces friction between the articulating bones during movement.
4. Identify the articular cartilage covering the ends of the bones. This smooth cartilage cushions the bones and allows smooth movement.
5. Recognize the ligaments outside the joint capsule that connect bone to bone, providing additional support and limiting excessive movement.

Key Concepts

Synovial Joint Structure

A synovial joint is a type of joint characterized by a fluid-filled joint cavity that allows for free movement between bones. Key structures include the articular cartilage, synovial membrane, joint cavity, and ligaments, all of which work together to facilitate smooth and stable motion.

Articular Cartilage

Articular cartilage is a smooth, white tissue that covers the ends of bones in synovial joints. It reduces friction and absorbs shock during movement, protecting the bones from wear and tear. This cartilage is avascular, relying on synovial fluid for nutrient exchange.

Synovial Fluid and Membrane

The synovial membrane lines the joint capsule and produces synovial fluid, a viscous liquid that lubricates the joint cavity. This fluid nourishes the articular cartilage and reduces friction between the articulating bones, enabling smooth and pain-free joint movement.