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All three of the basic steps INSPIRATION, VENTILATION and PERFUSION although 1/2 of the 2nd phase or VENTILATION process requires no oxygen and it is the expiration of carbon dioxide from the body through the lungs.

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7y ago
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12y ago

Aerobic requires oxygen

Anaerobic does not require oxygen

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12y ago

Aerobic or glycolysis.

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Q: Which steps in respiration require oxygen?
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