Tulang tibia, or the tibia, is one of the major bones in the lower leg. It is located between the knee and the ankle and is the larger of the two bones in that area, the other being the fibula. The tibia plays a crucial role in supporting body weight and facilitating movement. The tibia has a triangular shape and is responsible for forming the knee joint at its upper end and the ankle joint at its lower end. It also serves as an attachment point for various muscles and ligaments, contributing to stability and mobility during activities like walking and running.