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By Kim Bussing
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Comments (305)
Wow. I never knew the human body was sooooooo advanced
Wow, I did not know that
Wow. Well at least it has another use
I need to breathe with my lungs and this is really cool
Thank you lungs!
wow that is so cool, I had no idea
This is interesting and this article is like a did you know fact that you would find in a book or something and turned into an article.
I never heard that your lungs produce blood! This is a very interesting article.
WOW
this is is the best