In human anatomy, the clavicle or collar bone is a bone that makes up part of the shoulder girdle (pectoral girdle).
Clavicle - Overview.
It is a doubly-curved long bone that connects the arm (upper limb) to the body (trunk), located directly above the first rib. Medially, it articulates with the breast-bone (sternum) at the sternoclavicular joint. At its lateral end it articulates with the acromion of the shoulder-blade (scapula) at the acromioclavicular joint. It is shorter, thinner, less curved, a ...
Note: this article uses some professional terms to explain certain anatomical details. These words apply only when the body is in anatomical position, i.e., standing with palms of the hands facing forward. These terms are:
superior - above
inferior - below
abduction - the movement of the limb away from the body
medial - toward the midline
lateral - away from the midline
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The clavicle serves several functions:
It serves as a rigid support from which the scapula and free limb are suspended. This arrangement keeps the upper limb away from the thorax so that the arm has maxiumum range of movement.
Covers the cervicoaxillary canal (passageway between the neck and arm), through which several important structures pass.
Transmits impacts from the upper limb to the axial skeleton.
Even though it is classified as a long bone, the clavicle has no medullary (bone marrow) cavity like other long bones. It is made up of spongy (cancello ...
