The clavicle, commonly known as the collarbone, is a long, S-shaped bone that connects the sternum to the scapula. A labeled diagram of the clavicle may include the following structures:

• Sternal end: The medial end of the clavicle that articulates with the manubrium of the sternum.
• Acromial end: The lateral end of the clavicle that articulates with the acromion of the scapula.
• Conoid tubercle: A small, conical projection on the undersurface of the clavicle, close to the acromial end. This serves as the attachment site for the conoid ligament.
• Trapezoid line: A ridge on the undersurface of the clavicle, close to the acromial end. This serves as the attachment site for the trapezoid ligament.

The clavicle is an important bone that helps to support the shoulder girdle and arms, and serves as a point of attachment for various muscles and ligaments. It is also a commonly injured bone, often as a result of falls, sports injuries, or motor vehicle accidents.