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In which animal does air flow through the lungs in one direction only?
Wiki User
∙ 12y ago
Birds. (in Biology book-the living world 5th edition/g. Johnson and j. losos/page578
Additional information: in birds, incoming air flows through the lungs and on into air sacs. When the air is expelled, it flows from the air sacs back through the lungs on its way out of the body.
So the flow of air is still tidal, as in humans, but the air does not "stop and turn around" in the lungs.
Wiki User
∙ 12y ago
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