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Latissimus dorsi is a broad, thick muscle located on the back. It runs from the lower spine and pelvis up to the upper arm bone, crossing the lower rib cage toward the armpit region. This back-spanning placement explains why it’s categorized as a back muscle rather than something of the arm, leg, or foot. Its actions—pulling the arm downward and toward the body and helping with internal rotation—further reflect its position on the back, near the shoulder. So, the back is the correct location.