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I'm a bit confused and tired,help? http://prntscr.com/3s1k7s
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@Abhisar
what do u think ?
my brain is about dead right now @.@ but I'm guessing C??
I will go for A
what about air? doesn't lung receive air?
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respiration is defined as the transport of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction.
OH!! *faceslam*
LOL XD that's excatly how I feel right now
next one :D
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