Biology, asked by SRIDHAR2009, 11 months ago

8. How are alveoli designed and why

Answers

Answered by reeeena96

Answer:

Alveoli provide a surface for the exchange of gases. An extensive network of blood vessels is present in the wall of the alveoli. Air is sucked into the lungs and alveoli. The oxygen from the breath, diffuses into the blood and CO2 from the blood brought from the body, diffuses out into the air.

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