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Describe The Difference Between Alvereolus And Alveoli

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Each alveolus is ventilated, thus removing waste carbon dioxide and replenishing oxygen levels in the alveolar air. This also helps to maintain the maximum concentration gradient between the blood and the air in the alveoli. Although each of the alveolus/alveoli are very small, an average adult contains around 600 million alveoli which give off a total surface area of about 100m². As well as this, the walls of the alveoli are composed of a single layer of flattened epithelial cells, the walls of the capillaries consist of the same. These surfaces are very thin allowing gasses to diffuse easily as it is only necessary for them to diffuse through two thin cells. The steep concentration gradient across the gas exchange surface is maintained in

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