Science
Human lungs and O2 absorption

Question Description

I don’t understand this Biology question and need help to study.

How can human lungs get enough oxygen from the atmosphere even though the percent composition of oxygen in the atmosphere is so low.

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Final Answer

Human lungs are able to do this because they use alveoli for gas exchange. Alveoli are only one cell thick so the diffusion process can take place rapidly at the slightest concetration gradients. 

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