The meniscus is a crescent-shaped cartilage structure located in the knee joint, specifically between the femur (thigh bone) and the tibia (shin bone). Each knee has two menisci: the medial meniscus on the inner side and the lateral meniscus on the outer side. These structures help absorb shock, stabilize the knee, and distribute weight across the joint. Injuries to the meniscus are common, particularly in sports, and can lead to pain and mobility issues.