How muscles are able to contract and relax to bring about movement
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Muscles are able to contract and relax to bring about movements. ... Movement is caused by the contraction and relaxation of muscles. When one muscle contracts, the other relaxes and this causes displacement. The muscles of our heart are called involuntary muscles as they don't work according to our will.
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Answer:
Movement is caused by the contraction and relaxation of muscles. When one muscle contracts, the other relaxes and this causes displacement.
Explanation:
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