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The breathing organ of our body are lungs. IT plays an important role in exchange of gases between the blood and air and the gas is oxygen and carbon dioxide.Respiratory surface alveoli are present in the lungs.Air enters alveoli during inhalation. Oxygen of inhaled air diffuses into blood while carbon dioxide of blood passes out into alveoli . Foul air is passed out of lungs during exhalation.

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15y ago

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