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what gases do humans inhale and exhale what gases do we inhale and exhale during respiration what gases do we inhale and exhale what gas do we inhale and exhale what gas do we inhale and exhale during respiration what gas do we inhale and exhale the same amount of what gases do we inhale and exhale when we breathe which gas do humans breathe in oxygen and exhale what gas do humans breathe out when they exhale which gas human inhale and exhale
