Final answer:
The pectoral girdle consists of the clavicle and scapula, providing attachment points for the upper limbs to the axial skeleton and allowing significant mobility.
Step-by-step explanation:
The pectoral girdle is an anatomical feature that consists of the clavicle (collarbone) and the scapula (shoulder blade). These bones serve to attach the upper limbs to the axial skeleton, specifically to the sternum of the thorax, facilitating a wide range of motion. The clavicle is positioned anteriorly, acting as a strut between the shoulder blade and sternum, while the scapula is a posterior, pear-shaped flat bone that helps to form the shoulder joint.