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Expand-A-Lung Breathing Fitness Exerciser 4 +1 Free Promotion
mpn: EAL4+1, ean: 0600151111138,
THE FLOW OF AIR IN AND OUT OF THE ALVEOLI IS CALLED VENTILATION AND HAS TWO STAGES: iNSPIRATION (FOR INHALATION) AND EXPIRATION (FOR EXHALATION). TO ACCOMPLISH THIS, THE WHOLE THORAX MOVES AND AND CHANGES SIZE, DUE TO THE ACTION OF TWO SETS OF MUSCLE...
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