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Oxygen (O2) is delivered via artery to capillary to muscle tissue where its used in metabolism resulting in CO2; then CO2 goes from muscle tissue to venous system to pulmonary(lung) system where CO2 is exchanged for O2, then returned to the heart for recirculation.

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12y ago
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14y ago

through the capillaries

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Q: How is oxygen unloaded from the arterial blood to the muscle and carbon dioxide removed from the muscle into the venous blood?
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