<prompt> What structure contributes to the knee joint?lateral malleolus of the fibulatibial tuberositymedial condyle of the tibialateral epicondyle of the femur  <response>: The upper surface of the right tibia. Anterior is at the top. The medial condyle is the medial portion of the upper extremity of the tibia. It is the site of insertion for the Semimembranosus muscle. 