Ankle Anatomy
The ankle is the joint where the foot and leg meet and is the meeting place of three bones: the tibia, the fibula and the talus.

Ankle Cartilage
The joint surface of all the bones in the ankle are covered with articular cartilage.

Achilles Tendon
The Achilles tendon, also known as the calcaneal tendon is a tendon on the back of the leg which attaches the calf muscle to the heel bone. It passes behind the ankle and is the strongest and thickest tendon in the body.  The Achilles tendon can receive a load stress of almost four times your body weight while walking and over seven times your body weight while running.