The appendicular skeleton consists of the shoulder girdle with the upper limbs and the pelvic girdle with the lower limbs.
Shoulder (Pectoral) girdle
The shoulder girdle consists of two scapulae and two clavicles, which attach the bones of the upper limbs to the axial skeleton.
Clavicle (collar bone)
Each clavicle is a long, slender S shaped bone with two curves, one convex and one concave. It articulates with the manubrium of the sternum at the sternoclavicular joint and forms the acrominoclavicular joint with the acromion process of the scapula. The clavicle provides the only bony link between the upper limb and the axial skeleton.
Scapula (shoulder blade)
Each scapula is a large, triangular, flat bone situated in the posterior part of the thorax between the level of the second and seventh ribs and separated from them by muscles. At the lateral angle is a shallow articular surface, the glenoid cavity, which, with the head of the humorous, forms the shoulder joint.
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