The knee:

• A. the cruciate ligaments are intra-synovial
• B. the posterior cruciate ligament stabilises the flexed weight-bearing knee
• C. the posterior horn of the medial meniscus is attached to the intercondylar area of the tibia behind the posterior cruciate ligament
• D. the knee joint normally contains 5.0ml of synovial fluid
• E. active rotation may occur in the extended knee