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Muscular System

Muscle Structure

Which type of lever system works at the greatest speed, but at a mechanical disadvantage?

Third-class levers work at the greatest speed, but at a mechanical disadvantage. This arrangement is load-effort-fulcrum. Most skeletal muscles in the body, such as the bicep muscle of the arm, act in third-class lever systems. The biceps lift the distal forearm and anything carried in the hand. The elbow acts as the fulcrum.



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