9. The bone that makes up the majority of the heel is the: a. Talus b. Calcaneus c. Navicular d. Cuboid

The bone that makes up the majority of the heel is the calcaneus. This large bone supports the weight of the body when standing and serves as the attachment point for the Achilles tendon, making it crucial for activities like walking and running. When you think of your heel striking the ground, it's the calcaneus that absorbs much of the impact, providing stability and leverage for movement. It's fascinating to consider how this single bone plays such an integral role in our mobility and can even be subject to various injuries that can affect our daily activities!