The Mounth Is A Tail Pipe.....

a: Carbon dioxide ~
b: the human body's exhaust

What: "Carbon dioxide is like the human body's exhaust. Our lungs are the specialized organs where gas exchange takes place. Gas exchange means simply that one gas is exchanged for another in the lungs. In the lungs there are many finely branched tiny blood vessels (actually called capillaries) as we inhale oxygen-rich air, the oxygen in the air binds to the blood in the capillaries as they pass through the lungs."

Writer: Not Stated
Date: Jul 22 2013 6:51 PM

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