how aleveli design for maximum absorption ?
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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. They have balloon – like structure that provide maximum surface area for exchange of gases.
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1) Alveoli have very thin walls almost one cells thick .
2)There are millions of Alveoli in the lungs which increase the surface area for absorption .
3) They have fine and delicate membrane which helps in maximum absorption of gases .
4) They are richly supplied with an extensive network of blood capillaries .
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