Which two structures are associated with the calcaneus? (Select two)

The correct choice highlights two structures intimately associated with the calcaneus: the sustentaculum tali and the tuberosity.

The sustentaculum tali is a shelf-like projection located on the medial side of the calcaneus that serves as a supportive structure for the talus. It plays a crucial role in maintaining the stability of the ankle joint and acts as a point of attachment for the ligaments that support the foot's arch. Its relationship with the calcaneus is essential for proper alignment and function of the hindfoot.

The tuberosity of the calcaneus refers to a prominent bony projection on its posterior aspect, which serves as an important attachment point for the Achilles tendon. This tendon connects the calf muscles to the heel bone, facilitating walking, running, and jumping. The tuberosity is a key landmark in understanding foot mechanics and is involved in power transmission during movement.

Understanding the association of these structures with the calcaneus is vital for comprehending foot anatomy and pathology, particularly when evaluating conditions that may affect the Achilles tendon or the stability of the ankle joint.