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why larger organisms like humans need a breathing system

Human Anatomy, Physiology, and Medicine. Anything human!

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why larger organisms like humans need a breathing system

Postby bryanwong » Mon Nov 28, 2011 1:57 pm

why larger organisms like humans need a breathing system while small organisms don't ?
thanks for you answers
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Postby JackBean » Mon Nov 28, 2011 2:01 pm

do you know, how do the small organisms obtain oxygen and get rid of CO2?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby bryanwong » Tue Nov 29, 2011 12:53 pm

YES,by diffsuin across their body cells
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Postby JackBean » Tue Nov 29, 2011 1:01 pm

so, you answered your own question ;)
(think about how is diffusion efficient for transportation across bigger distances)
http://www.biolib.cz/en/main/

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