The importance of exchange surfaces and transport systems in plants
Lesson 7 / 9
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I can explain how exchange surfaces and transport systems enable cells in multicellular plants to be supplied quickly with substances they need to stay alive.
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Cells in all parts of a multicellular plant need water and nutrients, such as mineral ions, to stay alive.
Xylem and phloem transport substances around the plant and minimise the distance they have to diffuse to reach cells.
Root hair cells are an example of an exchange surface in plants.
The root hair cell membrane is adapted to maximise the surface area for osmosis of water and active transport of ions.
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