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When people run long distances, their muscles require increased amounts of oxygen. Which system is responsible for carrying this oxygen to the muscles? Nervous Respiratory Digestive Circulatory
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When people run long distances, their muscles require increased amounts of oxygen. Which system is responsible for carrying this oxygen to the muscles?

Nervous


Respiratory


Digestive


Circulatory

User Ahmad Raza
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2 votes
It would be the respiratory system
User Warchantua
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