Which bone is known as the collarbone?

The clavicle is commonly known as the collarbone due to its prominent, S-shaped appearance that runs horizontally across the top of the chest. It serves as a crucial connection between the arm and the torso, articulating with both the sternum at one end and the scapula at the other. The structure of the clavicle not only helps stabilize the shoulder but also plays a role in protecting underlying nerves and blood vessels. Its location and function make the term "collarbone" apt, as it sits just beneath the skin, creating a visible and palpable landmark on the chest. Understanding the clavicle's anatomy is essential for identifying various shoulder injuries and conditions, emphasizing its importance in overall upper body movement.