Final answer:
The adjective 'clavicular' pertains to the clavicle, while 'scapular' refers to the scapula. Both are part of the pectoral girdle, which attaches the upper limbs to the axial skeleton.
Step-by-step explanation:
The term clavicular pertains to the clavicle, which is a bone that connects to the sternum at the sternoclavicular joint on its medial end, and either the right or left scapula at the acromioclavicular joint on the lateral end.
The scapular adjective refers to the scapula, a flat bone that participates in forming the shoulder joint and serves as the attachment point for the upper arm bones.
The pectoral girdle, comprised of the clavicles and the scapulae, attaches each upper limb to the axial skeleton, mainly the sternum and thoracic cage.