Asked by ASA

Why does the blood go from the lungs to pick up oxygen and then return back to the heart to be pumped around the body ?

Why can't it just get out of the lungs from the first pump and then pick up an artery and go around of the body instead of returning ?

Answered by GuruBlue
Sorry, I am smiling.... but it doesn't do that because that is just not the way it was built.

Maybe as we "evolve" we will become more efficient. <G>
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