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Why do your cells need extra blood during exercise or other physical activity?

User Benbo
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To remove waste during exercice. Blood flow is greater when you execise  because of the blood vessle
User Dhiraj Dhule
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It is because of this need to bring in large amounts of materials and remove waste products that blood flow increases dramatically during exercise. Blood flow is greater when you exercise because the blood vessels in your muscles dilate.
User Yaobin Then
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