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Long bone vs flat bone1/18/2024 Right clavicle-from below, and from above At its flattened lateral end (acromial end), it articulates with the acromion, a process of the scapula (shoulder blade), at the acromioclavicular joint. At its rounded medial end (sternal end), it articulates with the manubrium of the sternum (breastbone) at the sternoclavicular joint. Located directly above the first rib, it acts as a strut to keep the scapula in place so that the arm can hang freely. The collarbone is a thin doubly curved long bone that connects the arm to the trunk of the body. It can easily be fractured by impacts to the shoulder from the force of falling on outstretched arms or by a direct hit. The clavicle is the most commonly fractured bone. It receives its name from Latin clavicula 'little key' because the bone rotates along its axis like a key when the shoulder is abducted. It is a palpable bone and, in people who have less fat in this region, the location of the bone is clearly visible. Together with the shoulder blade, it makes up the shoulder girdle. ![]() The clavicle is the only long bone in the body that lies horizontally. There are two clavicles, one on the left and one on the right. ![]() The clavicle, or collarbone, is a slender, S-shaped long bone approximately 6 inches (15 cm) long that serves as a strut between the shoulder blade and the sternum (breastbone).
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