Explain why, when air is taken in and let out during breathing, the lungs always contain a residual volun
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Explain why, when air is taken in and let out during breathing, the lungs always contain a residual volun
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Explanation:
We should know that during the breathing cycle, when air is taken in or inhaled and let out or exhaled, the lungs always contain a certain residual volume of air so that there is sufficient time 'for the oxygen to be absorbed' in to the blood and 'for carbon dioxide to be released' from the blood.