How water and minerals are transported to leaves from roots
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Water and mineral nutrients are absorbed by roots from the soil. Nutrients are transported along with water to the entire plant via the vascular tissue called xylem. ... Transpiration generates a force which pulls up water absorbed by the roots from the soil, to reach the stem and leaves.
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Water and mineral salts are absorbed through root hair from soil. Water from the soil enters the xylem of the root by the process of osmosis. This happens as follows:
- The water in the soil has a weak solution of salts. The cell sap in the root hair has a stronger solution. Water passes from the soil into the root hair by osmosis.
- The water has diluted the cell sap in the root hair cell. The root hair cell now has a weaker solution than the cell beside it ( cell A ). Water passes from the root hair cell into cell A by osmosis.
- The water has now diluted the cell sap in cell A. Cell A now has a weaker cell sap than the cell beside it ( cell B ). So water passes from cell A to cell B by osmosis.
- This continues across the whole of the root cortex.
- Water eventually reaches the root xylem.
- From the root xylem, it is pulled up in the stem and leaves and ultimately leaves the plant through a process called of Transpiration.
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