In the human body, the bone known as the collarbone is the clavicle. This slender bone connects the arm to the body and sits horizontally between the sternum (breastbone) and the scapula (shoulder blade). The clavicle plays a crucial role in stabilizing the shoulder and facilitating arm movement. It acts as a strut to hold the shoulder joint in place and protects underlying blood vessels and nerves. Due to its superficial position, the collarbone is prone to fractures, especially in contact sports and other activities where shoulder impacts are common.