Which bone is commonly referred to as the collarbone?

The bone commonly referred to as the collarbone is the clavicle. The term "collarbone" is derived from its location and shape, resembling a collar that sits horizontally at the base of the neck. The clavicle connects the arm to the body and acts as a strut to hold the shoulder in place. It also serves as an attachment point for ligaments and muscles involved in shoulder movement and stability.

In addition to its structural role, the clavicle protects neurovascular structures that supply the upper limb and serves as a critical component in maintaining the integrity of the shoulder girdle. Its unique shape allows for a certain range of motion in the shoulder, making it essential for various upper limb functions.

Understanding the role of the clavicle in the skeletal system provides insight into its importance in both anatomy and movement, reinforcing its designation as the collarbone.