What is the primary function of cartilage in the body?

The primary function of cartilage in the body is to protect bones from wear and tear. Cartilage serves as a smooth, slippery surface that allows joints to move easily while also acting as a cushion between bones, thereby reducing friction during movement and absorbing shock. This protective role is particularly significant in areas such as the knee, hip, and shoulder joints, where repetitive motion can cause excessive wear on the bones. Cartilage's unique structure, which includes a high water content and no direct blood supply, enables it to maintain this cushioning effect without succumbing to damage as quickly as bone might. Additionally, the presence of cartilage helps to maintain joint stability and health throughout a person's life, supporting overall mobility and function.