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: 3. Wait 1 day and observe.
: 4. Snap the celery in line with the coloured lines.
: 5. Use fingernails or a pair of tweezers to pull out the coloured tubes and observe.
==Key Stage 3==
===Meaning===
The '''water transport system''' [[Organ System|organ system]] in [[Plant|plants]] used to move [[water]] from the [[Root|roots]] to the [[Leaf|leaves]].