The calcis is the:

The calcis is the:

• A. Elbow
• B. A calcium deposit in the bone
• C. The wrist
• D. Heel bone

Answer: (D)

The calcis refers to the heel bone, the calcaneus. It’s the large bone at the back of the foot that forms the heel and serves as the main lever for pushing off when you walk or run. It bears a lot of body weight, provides attachment for the Achilles tendon via the calcaneal tuberosity, and interfaces with other foot bones to make up the hindfoot and ankle joints. This distinguishes it from the elbow or wrist, which are in the arm and forearm and involve different bones, and from a calcium deposit in bone, which would describe a process like calcification rather than the bone itself.

The calcis refers to the heel bone, the calcaneus. It’s the large bone at the back of the foot that forms the heel and serves as the main lever for pushing off when you walk or run. It bears a lot of body weight, provides attachment for the Achilles tendon via the calcaneal tuberosity, and interfaces with other foot bones to make up the hindfoot and ankle joints. This distinguishes it from the elbow or wrist, which are in the arm and forearm and involve different bones, and from a calcium deposit in bone, which would describe a process like calcification rather than the bone itself.