Which of the following accurately describes a characteristic of articular cartilage?

• A. Rich blood supply
• B. Allows for flexibility
• C. Poor blood supply
• D. High cell density

Answer: (C)

Articular cartilage is a specialized tissue that covers the ends of bones in synovial joints, facilitating smooth movements and cushioning impacts. A key characteristic of articular cartilage is its poor blood supply, which is essential for its function. The lack of direct vascularization means that the cartilage relies on the diffusion of nutrients and waste products from the synovial fluid rather than receiving them from blood vessels. This unique attribute is crucial because it affects the healing capacity of the tissue; damage to articular cartilage tends to be less amenable to healing due to this limited blood supply.

The presence of a poor blood supply allows articular cartilage to maintain its structural integrity while relying on its unique composition and the surrounding joint environment to support cellular functions. Understanding this characteristic is essential for recognizing the challenges faced in treating joint injuries or diseases that affect cartilage, such as osteoarthritis.