The talus (TAY-lus) is a small bone that sits between the heel bone (calcaneus) and the two bones of the lower leg (tibia and fibula). It has an odd humped shape, somewhat like a turtle.
The bones of the lower leg "ride" on top and around the sides to form the ankle joint. Where the talus meets the bones of the foot, it forms the subtalar joint, which is important for walking on uneven ground.
The talus is an important connector between the foot and the leg and body, helping to transfer weight and pressure forces across the ankle joint.