The simulations dorsi is a large, flat muscle on the back that stretches to the sides, behind the arm, and is partly covered by the trapeziums on the back near the midlife. The word simulations Doris comes from Latin and means `broadest of the back`, from `latissimus` and `dorsum` . The pair of muscles are commonly known as `lats`, especially among bodybuilders. The latissimus dorsi is the largest muscle in the upper body.

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