"The outer layer of the knee capsule consists of fibrous connective tissue to hold the joint in place, whereas the inner layer consists of a synovial membrane, which secretes synovial fluid into the joint to provide lubrication."
"There is no capsule above the patella, allowing the suprapatellar bursa to communicate with the joint."
"There is also an aperture for the popliteus tendon at the lateral tibial condyle."