The forelimbs are supported from the pectoral girdle. The humerus bone articulates at a point between the sternum and inter scapula. Similarly, the femur fits into an opening of the ischium. At the lowest point of the pectoral girdle is the sternum, a bone which protects a good part or the internal organs. Between the sternum and the pelvis may be a bony or cartilaginous union of the ribs, known as the parasternum. Extending from beneath the scapula and uniting with the sternum is the clavicle, a bone always present in pairs.
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