The Probert Encyclopaedia of Medicine

TIBIA

The tibia (shin-bone) is the robust, primary bone of the two in the lower leg. The tibia bears most of the weight. Its head (upper, or proximal, end) articulates with the parallel fibula and the femur at the knee joint. At its distal, or lower, end it articulates with the fibula and the talus of the ankle. Protruding portions of the lower end of the tibia, called the medial malleolus (inside) and lateral malleolus (outside) form the large bumps which characterize the ankle joint.
Research Tibia