What occurs with gas exchange across the alveolar capillary membrane?
A) Alveolar units ventilate and capillary units bring deoxygenated blood to the tissues, excreting O₂ back into the alveoli to be removed through the lungs.
B) Alveolar units ventilate and capillary units bring oxygenated blood to the tissues, excreting CO₂ back into the alveoli to be removed through the lungs.
C) Alveolar units ventilate and capillary units bring oxygenated blood from the tissues, excreting O₂ back into the alveoli to be removed through the lungs.
D) Alveolar units ventilate and capillary units bring CO₂ to the tissues, excreting O₂ back into the alveoli to be removed through the lungs.
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