Human lungs and O2 absorption

timer Asked: Jul 6th, 2014
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Question Description

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

Tutor Answer

Arjun Patel
School: Rice University

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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Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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