Friday 22 February 2013

2.50 understand the need for a transport system in multicellular organisms

Multicellular organisms have a small surface area to volume ratio and the distance for diffusion would be very large and so very slow. This wouldn't support the organism; so they have developed transport systems, like the ventilation system and the circulatory system which speed up the process of getting necessary molecules in and out of the body enough to support themselves.
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14 comments:

  1. Ali Sikab10 May 2014 at 11:15

    Thanks for doing this, really appreciate it

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    Replies
    1. HannahHelp17 June 2015 at 15:55

      That's ok :)

      Delete
    2. Unknown23 November 2015 at 09:53

      Dude this hannah girls XD, she's so fucking insane, has basically saved me for my gcses xDDDDDDDDDDDDD

      Delete
    3. Unknown23 November 2015 at 09:54

      Dude this hannah girls XD, she's so fucking insane, has basically saved me for my gcses xDDDDDDDDDDDDD

      Delete
  2. Unknown13 May 2015 at 10:04

    Literally a life saver, thank you!

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  3. Unknown23 May 2015 at 04:53

    Are you sure it "speeds up diffusion"?

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    Replies
    1. HannahHelp17 June 2015 at 15:55

      Yeah I guesse you're right it doesn't really speed up diffusion, it more just speeds up the process of getting things in and out of the body.. I'll try rephrase it haha :)

      Delete
  4. ritik25 May 2015 at 06:42

    Sneaky bio revision amar

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  5. Anonymous12 December 2016 at 11:30

    Thank you so much. My GCSEs are next year and I'm quite stressed, this website has been extremely helpful.

    ReplyDelete
  6. Mike Tsang26 June 2017 at 02:51

    The Biology Syllabus has changed.... New Syllabus Blog:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  7. SophieRice26 June 2017 at 18:06

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/250-understand-need-for-transport.html

    ReplyDelete
  8. Badra29 July 2018 at 14:17

    This comment has been removed by the author.

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  9. Platon18 December 2018 at 03:35

    r the comments trolls?

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