The knee joint capsule is the structure surrounding the knee, made up of ligaments, bone, and fluid-filled cavities. It allows the full knee to have flexion, or bending motion, due to the folds within ...

The knee is a meeting place for four bones — the femur (thigh bone), tibia (shinbone), fibula (calf bone), and patella (kneecap). It requires several ligaments to keep these bones in place and ...