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8-transport in plants - Coggle Diagram
8-transport in plants
transpiration
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the pressure difference at the top and at the bottom of a xylem vessel is called "transpirational pull"
it is much easier to calculate how much water is taken up by a plant than to calculate how much water is lost to transpiration
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plant transport systems
phloem
phloem transports sucrose and amino acids from the leaves where they are made to other parts of the plant
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xylem vessels and phloem tubes are usually found close together. A group of them is called a "vascular bundle"
in stems, vascular bundles are arranged in a ring near the outside edge
transport of water
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the water travels by osmosis from the root hair cells, through the cortex, to the xylem vessels, which are in the centre of the root
water goes up, against gravity, because at the bottom the pressure is higher than that at the top
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