muscles work in pair. justify
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Answer:Muscles work in pairs to move a bone. For this reason they always come in pairs. When one muscle in a pair contracts, to bend a joint for example, its counterpart then contracts and pulls in the opposite direction to straighten the joint out again.
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When one of them contracts, the bone is pulled in that direction. The other muscle of the pain relaxes. To move the bone in the opposite direction, the relaxes muscles contracts to pull the bone towards its original position, while the first relaxes. A muscle can only pull. It cannot push. Thus, two muscles have to work together to move a bone.
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