This blog will cover and explain the specification for Edexcel triple science course 2013 for biology. Hope it helps :)
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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Thanks for doing this, really appreciate it
ReplyDeleteThat's ok :)
DeleteDude this hannah girls XD, she's so fucking insane, has basically saved me for my gcses xDDDDDDDDDDDDD
DeleteDude this hannah girls XD, she's so fucking insane, has basically saved me for my gcses xDDDDDDDDDDDDD
DeleteLiterally a life saver, thank you!
ReplyDeleteNo problem!
DeleteAre you sure it "speeds up diffusion"?
ReplyDeleteYeah 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 :)
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ReplyDeletehttp://igcse-biology-notes.blogspot.hk/2017/06/250-understand-need-for-transport.html
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ReplyDeleter the comments trolls?
ReplyDelete