1 — Medial surface of tibia; 2 — Tibial collateral ligament; 3 — Medial meniscus; 4 — Patellar ligament; 5 — Quadratus femoris; 6 — Femur; Thigh bone; 7 — Medial condyle of femur; 8 — Medial epicondyle; 9 — Quadriceps femoris; Tendon; 10 — Lateral epicondyle; 11 — Lateral condyle of femur; 12 — Patella; 13 — Patellar surface; 14 — Lateral meniscus; 15 — Fibular collateral ligament; 16 — Anterior ligament of fibular head; 17 — Tibial tuberosity; 18 — Fibula; 19 — Head of fibula; 20 — Posterior ligament of fibular head