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Water is essential for photosynthesis, for maintaining cell turgor and for transporting dissolved minerals throughout the plant. This lesson explains how water moves from the soil, through the roots, up the stem and into the leaves via the xylem. Understanding the transpiration stream and the structure of xylem vessels is a key part of Edexcel GCSE Biology (1BI0) Topic 6.
Water follows a continuous pathway called the transpiration stream:
This continuous flow from roots to leaves is driven by the evaporation of water from the leaves.
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