Final answer:
The muscle in the upper body that covers the upper chest is the Pectorals or pectoralis major muscle. It is responsible for movements of the shoulder joint and the upper arm.
Step-by-step explanation:
The muscle in the upper body that covers the upper chest is the Pectorals or pectoralis major muscle. It is a large muscle that consists of two parts, the clavicular head and the sternal head. The pectorals are responsible for movements of the shoulder joint and the upper arm. They help in actions like pushing, pulling, and lifting heavy objects.
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