the lung alveoli are covered with blood capillaries __
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Explanation:
Alveoli present in the lungs are covered with blood capillaries so that the exchange of gases can take place between the membranes of the alveoli and the surrounding capillaries. The blood capillaries covering alveoli have a low oxygen and high carbon dioxide concentrations.
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The lung alveoli are covered with blood capillaries so that the exchange of gases can take place between the membrane of the alveoli and capillaries.
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