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How are oxygen, carbon dioxide, and other waste gases, exchanged in the lungs and body tissues MORE?

In: SciTech › Science › Biology › Carbon Dioxide Oxygen

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O2 diffusing from the alveoli into the blood & CO2 from the blood into the alveoli. Diffusion requires a concentration gradient. So, the concentration (or pressure) of O2 in the alveoli must be kept at a higher level than in the blood & the concentration (or pressure) of CO2 in the alveoli must be kept at a lower level etc

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