Which of the following structures is crucial for smooth movement at the joints?

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Articular cartilage is a smooth, white tissue that covers the ends of bones in joints. Its primary function is to reduce friction between bones during movement, allowing for fluid and pain-free joint motion. This cartilage absorbs shock and provides a smooth surface for bone interaction, which is essential for maintaining joint health and function.

In joints, especially synovial joints, articular cartilage plays a critical role in facilitating movement by ensuring that the surfaces of the bones glide smoothly over each other rather than grinding against one another. This smooth movement is crucial for activities such as walking, running, and other forms of physical exertion, where joints need to move gracefully and with minimal resistance.

Other structures such as the periosteum and endosteum serve different purposes, primarily relating to bone growth and repair, while fibrocartilage may provide cushioning in certain joints but is less involved in reducing friction than articular cartilage. Thus, articular cartilage is specifically designed to ensure smooth movements at the joints.

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