2 lungs to breathe?

Every day your body uses about 90 gallons of pure oxygen.  To separate this gas from the air, the innate intelligence of the body uses your lungs.

The lungs contain 500,000,000 tiny air sacs with a surface area of 50 to 60 square MILES!  The walls of the sacs and of the blood vessels that wind around and around each one are one cell thick.  Molecules of oxygen leave the air in the sacs and pass right through these 2 one-cell walls into your blood.

At the same time, molecules of carbon dioxide gas (which your body must get rid of) go from your blood into the air sacs and are exhaled with your breath.  This process is called diffusion.

AMAZING ISN’T IT?

20/20 VISION — SEEING YOUR POSSIBILITIES!

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