Clavicle, commonly known as "beauty bone", is an S-shaped slender bone, which is located under the skin, the dividing line between the neck and the chest, and the only bone connection between the upper limb and the trunk.
Keep the shoulder joint in a normal position, increase the range of motion of upper limbs and improve labor efficiency. The great blood vessels and nerves distributed in the upper limbs all pass through the back of the middle clavicle.
The clavicle is located above the chest, across the junction of neck and chest, and can be touched to the full length under the skin. It is an important bone symbol. The top of clavicle is smooth and the bottom is rough. It looks like a long bone, but it has no medullary cavity and can be divided into two ends.
The middle part is the clavicle, with the inner 2/3 protruding forward and the outer 1/3 protruding backward. A "~" shaped bone, one on the left and one on the right. The medial end is thicker and related to the sternal stalk, which is called sternal end.
The lateral end is flat and related to the acromion of the scapula, which is called acromion end. The clavicle supports the scapula, keeping a certain distance between the upper limb bone and the thorax, which is beneficial to the flexible movement of the upper limb. Because of its shallow position, the clavicle is prone to fracture, especially at the junction of the clavicle and the lateral side. 1/3.