The meniscus is a semilunar cartilage between the femoral condyle and the tibial plateau, with a thicker lateral edge and thinner medial edge. It is triangular in cross-section, thick outside and thin inside, slightly concave on top so as to coincide with the femoral condyles, and flat below to meet the tibial plateau. Such a structure precisely allows the femoral condyles to form a deeper depression in the tibial plateau, thus increasing the stability of the spherical femoral condyles to the tibial plateau. The anterior and posterior ends of the meniscus attach to the middle non-articular surface of the tibial plateau, anterior and posterior to the intercondylar spine, respectively. This area can also be referred to as the anterior and posterior angles of the meniscus. The meniscus lies between the femoral condyles and the tibial plateau, acting as a cushion to protect the joint surfaces of both and absorbing downward transmitted shock, especially during hyperflexion or extension. When jumping from a height, the knee is subjected to considerable force from the body’s gravity, but the cartilage of the femoral condyle and tibial plateau is not damaged because the presence of the meniscus spreads this force over the entire knee joint at the same time, rather than being limited to a restricted point on the tibial plateau where the femoral condyle touches the tibial plateau. In addition, the meniscus prevents displacement of the femur because its wedge shape compensates for the disproportion between the femoral condyle and the tibial plateau by filling the dead space around the rounded femoral condyle and tibial plateau, thereby increasing the stability of the knee joint and preventing the joint capsule and synovial tissue from entering between the articular surfaces. The meniscus also prevents the femoral condyle from sliding forward on the tibial plateau, regulating the pressure in the knee joint, and the meniscus is covered with a lubricating fluid that reduces friction by lubricating all parts of the joint. The meniscus itself is very flexible, and its bowed shape allows the edge of the joint cavity to better support the synovial capsule. The meniscus also supports the rotational movements of the knee, assists the lateral collateral ligaments in controlling the lateral motion of the joint and aids in the rotational movements of the joint.