What is the main function of the meniscus in the knee?

The meniscus in the knee primarily serves to absorb shock and stabilize the joint, which is crucial for maintaining knee health during weight-bearing activities. It acts as a cushion between the femur (thigh bone) and the tibia (shin bone), helping to distribute body weight evenly across the joint. This shock-absorbing function allows for smoother movements while reducing the risk of injury to the cartilage and ligaments surrounding the knee.

Additionally, the meniscus contributes to joint stability by deepening the joint socket, which enhances congruence between the femoral and tibial surfaces. This stability is vital for maintaining proper alignment during movement, particularly during activities that involve twisting or turning motions.

In the context of the other options provided, the enhancement of range of motion is more directly influenced by the ligaments and muscles around the knee rather than the meniscus itself. The connection of muscles to bones is a function of tendons, not the meniscus, and increasing blood flow is primarily managed by blood vessels rather than the structure of the meniscus. Thus, the role of the meniscus as a shock absorber and stabilizer is foundational to knee function and injury prevention.