Describe the movements of the tibiofemoral joint during knee flexion and extension and the function of the knee menisci.

• A. The tibiofemoral joint primarily mediates knee flexion and extension; the menisci deepen articular surfaces, cushion load, and improve joint congruency and stability.
• B. The patellofemoral joint is the primary hinge for flexion, and menisci stabilize the patella.
• C. The tibiofemoral joint is only for rotation; menisci produce synovial fluid.
• D. The fibulofemoral joint handles flexion; menisci are bone-forming structures.

Answer: (A)