What does the lungs contain during the breathing cycle, when air is taken in and let out?
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The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.
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hope it helps
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
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