Within the hindfoot is the largest bone in the foot: the calcaneus or heel, which is also one of the most important bones in the foot. The portion of the calcaneus closest to the heel is the calcaneal tuberosity. A roughened area on the upper portion of the calcaneal tuberosity acts as the insertion location for the Achilles tendon. This area also possesses three sections for articulation with the talus bone. On the anterior side of the calcaneus are articulation areas for the cuboid bone. The calcaneus also possesses many grooves through which the tendons pass.
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