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During evolution, as animals grew bigger and more active, there was a need to transport more oxygen to the tissues. How did nature fill this need?
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                    [AuthorName] => Eduardo A. Padlan, Ph.D.
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abtest

We need air (clean air!)

By Eduardo A. Padlan, Ph.D. | March 22, 2012 - 12:00am

During evolution, as animals grew bigger and more active, there was a need to transport more oxygen to the tissues. How did nature fill this need?

Science and Environment