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In jumans oxygen enters the body and carbon dioxide leaves it through the lungs.The lungs are made of thousands of tiny air sacs surrounded by blood vessels.How does this help the teo gases to diffuse
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In jumans oxygen enters the body and carbon dioxide leaves it through the lungs.The lungs are made of thousands of tiny air sacs surrounded by blood vessels.How does this help the teo gases to diffuse quickly into and out of the blood?

User Mhbdr
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The tiny air sacs increase the surface area where there can be gas to blood diffusion and vice versa.
User Soju
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