Additional File 2

The following diagram highlights the differences in the partial pressure of oxygen and carbon dioxide in the alveoli, blood and muscle cell and also shows the arterio-venous difference. Partial pressures of Oxygen and Carbon dioxide (mmHg) AtmospherePO2 160mmHgPCO2 0.3mmHg. Alveolar air PO2 105 PCO2 40. CO2O2 ................
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