What is Clavicle Bone?Write down its features and Muscle attachments?
CLAVICLE The clavicle is a long bone of upper limb. It supports the shoulder so that the arm can swing clearly away from the trunk.The clavicle transmits the weight of the limb to the sternum.The bone has the cylindrical parts called the Shaft, and two ends, lateral and medial. Peculiarities of the clavicle: 1. It is the only bone that lies horizontally. 2. It is subcutaneous throughout. 3. It is the first bone to start ossifying. 4. It is the only long bone which ossifies in membrane. 5. There is no medullary cavity. Features Of Clavicle: Shaft: The shaft is divided into lateral one-third and medial two-thirds. The Lateral one-third of the shaft is flattened from above downwards. It has two borders Anterior and Posterior.The anterior border is concave forwards. The posterior border is convex backwards.It has an elevation called the conoid tubercle, and ridge called the trapezoid ridge. The Medial two-thirds of the shaft is rounded and has four surfaces.The anterior surface is conv