The largest anterior trunk muscle is the

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The pectoralis major is the largest anterior trunk muscle. It is a thick, fan-shaped muscle that covers much of the chest and helps to flex the arm at the shoulder joint. The rectus abdominis is a long, narrow muscle that runs vertically down the abdomen and is responsible for flexing the trunk. The external oblique is a broad, flat muscle that runs diagonally along the sides of the abdomen and helps to rotate the trunk. The serratus anterior is a thin, triangular muscle that runs along the upper ribs and helps to pull the scapula forward. The deltoid is a large, triangular muscle that covers the shoulder and helps to raise the arm at the shoulder joint.

The Largest Anterior Trunk Muscle Is the