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explain the need for a transport system in a multi-cellular organism

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umer4 | Student, Undergraduate | eNotes Newbie

Posted October 8, 2012 at 1:24 PM via web

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explain the need for a transport system in a multi-cellular organism

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uzumakirage | Student, Undergraduate | eNoter

Posted October 8, 2012 at 7:25 PM (Answer #1)

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If we're talking about plants (or really just about any multicellular living organism), we know that different activities, such as cellular respiration, photosynthesis (for plants), etc... must take place for survival. And for such processes to take place, different substances are required (whether that is H2O, CO2, O2, or any other reactant necessary). Those substances need to reach every single cell in the organism, so that the organism can survive. Generally, with unicellular organisms, diffusion can be used, because they are small on size. However, diffusion is an incredibly slow process and would be very inefficient for a large multicellular organisms, which is why a sufficient, complex transport system is necessary. :)

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