How are alveoli designed maximise the exchange of gases? Suggest any 2 features.
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they have moist thin walls
they give lungs bigger surface area
they have lot of tiny blood vessels called capillaries
they give lungs bigger surface area
they have lot of tiny blood vessels called capillaries
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♥ The alveoli are thin walled and richly supplied with a network of blood vessels to facilitate exchange of gases between blood and the air filled in alveoli .
♥ Alveoli have balloon-like structure . Thus , provide maximum surface for exchange of gases .
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