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an image of the muscles showing different colored lines on their arms and legs, from top to bottom
the muscles are shown in three different colors, including pink, green and blue with two hands holding each other
an image of a man's torso with his arms folded in different colors and muscles
an image of a drawing of the back of a man's shoulder and arm
an image of the back of a man's torso with muscles highlighted in different colors
the back view of a man's body with multiple colored lines on his chest