What type of cartilage is found at the extremities of long bones?

What type of cartilage is found at the extremities of long bones?

• A. Elastic cartilage
• B. Articular/hyaline cartilage
• C. Fibrocartilage
• D. Dense cartilage

Answer: (B)

Articular or hyaline cartilage is the type of cartilage located at the extremities of long bones. This tissue serves several important functions in the skeletal system. It provides a smooth, lubricated surface for joint movement, reducing friction between bones during activities like walking or running. This cartilage also acts as a cushion, absorbing shocks and distributing loads across the joints to prevent damage to the underlying bone structures.

Hyaline cartilage is composed of a firm, gel-like matrix that contains a moderate amount of collagen fibers, contributing to its strength and ability to endure compressive forces. Its glossy appearance is due to the dense organization of collagen, which allows articular cartilage to maintain a smooth surface for optimal joint function. This characteristic is crucial for areas of the body that experience a high degree of mechanical stress.

Other types of cartilage, such as fibrocartilage, are found in areas that require additional support and strength, such as intervertebral discs and joint capsules, whereas elastic cartilage provides flexibility, as seen in structures like the ear. Dense cartilage is not recognized as a standard category within the classification of cartilage types, leading to its exclusion here.