Final answer:
The clavicle consists of a medial end which articulates at the sternoclavicular joint, and a lateral end that connects with the scapula's acromion. It is supported by the costoclavicular ligament and shows notable sex differences in its morphology.
Step-by-step explanation:
The clavicle has three regions: the medial end, the lateral end, and the shaft. The medial end, known as the sternal end of the clavicle, has a triangular shape and articulates with the manubrium portion of the sternum to form the sternoclavicular joint, which permits significant mobility for shoulder movements. This joint is supported by the costoclavicular ligament, which connects the sternal end of the clavicle to the first rib.
The lateral or acromial end of the clavicle articulates with the acromion of the scapula, which is the part of the scapula that forms the bony tip of the shoulder. There are notable sex differences in the morphology of the clavicle. In women, the clavicle is typically shorter, thinner, and less curved, while in men, it tends to be heavier, longer, with a greater curvature and rougher surfaces for muscle attachment, especially pronounced in manual workers.