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2014-07-31T18:45:23+08:00

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The 4gasses like carbon dioxide and oxyge,ninnert gasses,nitrogen ay papasok sa ating ilong papunta sa lung pag umabot na ito sa lung lalabas ang 3 gas,innert gassws,carbon dioxide and nitrogen ang oxygen lang ang maaring magtagal sa lungs at doon nag papalitan sa alveoli ang carbon dioxide and oxygen

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