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Multiple Choice
Which bones form the pectoral girdle in the human skeleton?
A
Clavicle and scapula
B
Humerus and radius
C
Sternum and clavicle
D
Scapula and humerus
Verified step by step guidance
1
Step 1: Understand the anatomical term 'pectoral girdle.' The pectoral girdle is the set of bones that connects the upper limb to the axial skeleton and provides support and mobility for the arms.
Step 2: Identify the bones that make up the pectoral girdle. The pectoral girdle consists of two bones: the clavicle (collarbone) and the scapula (shoulder blade). These bones work together to form the shoulder region.
Step 3: Eliminate incorrect options based on anatomical knowledge. For example, the humerus and radius are bones of the arm and forearm, not part of the pectoral girdle. Similarly, the sternum is part of the thoracic cage, not the pectoral girdle.
Step 4: Confirm the correct answer by matching the anatomical description of the pectoral girdle to the listed options. The correct pair of bones forming the pectoral girdle is the clavicle and scapula.
Step 5: Review the function of the pectoral girdle. It provides attachment points for muscles that move the upper limb and allows a wide range of motion for the shoulder joint.