Note to moderator: Read the answerline carefully. Damage to three structures in this body part make up O’Donoghue’s unhappy triad. In Osgood–Schlatter disease, a painful bump (10[1])directly below this body (-5[1])part (10[1])is caused by (10[1])epiphyseal plate tension during growth spurts. When extended by the vastus (10[1])medialis, this body part is stabilized by the screw-home mechanism and by posterior and anterior ligaments arranged in an “X” shape. The menisci of (10[1])this joint improve (10[1])its shock absorption (10[1])capacity. This joint’s soft cartilage hardens into (10[1])bone at age four and connects the femur and tibia. For 10 points, a common reflex test involves striking the patella of what largest joint located between the shin and thigh? ■END■ (10[1])