Uzi maalum wa kupeana Likes: Comment chochote upate "Like"

7Ubongo wa mwanadamu unahitaji 20% ya gesi yote ya oksijeni hiingiayo mwilini ili uwe active.
8.Ukosefu wa oksijeni kwa zaidi ya dakika 5 katika ubongo hupelekea uharibufu wa ubongo.
 
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