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In order to contract and allow us to move, muscles need to break down the enzyme ATP (Adenosine Triphosphate) to create energy. In order to replenish the ATP once it has been used, muscles require large amounts of oxygen and the way that oxygen is delivered to the muscles is through the blood supply. Therefore, without blood, the muscles would have no oxygen, would not be able to produce ATP and therefore would not be able to function.

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