Final answer:
The pectoralis major muscle is a fan-shaped axial muscle located on the anterior part of the upper chest, originating from the sternum and inserting into the humerus.
Step-by-step explanation:
The pectoralis major muscle is a thick, fan-shaped muscle situated on the anterior part of the thorax, covering much of the superior chest area. The pectoralis major muscle is a fan-shaped axial muscle located on the anterior part of the upper chest, originating from the sternum and inserting into the humerus. This axial muscle is responsible for several movements of the humerus and stabilizes the pectoral girdle.
The pectoralis major muscle is a fan-shaped axial muscle located on the anterior part of the upper chest, originating from the sternum and inserting into the humerus. It originates from the sternum and inserts into the humerus, and is therefore primarily located on the anterior side of the body.