OSMOSIS

The diffusion of water where water molecules move from an area of high water concentration to an area of lower water concentration through a differentially (semi) permeable membrane.

Soil water (high concentration)/water in cell sap (low concentration).

Water uptake into cells (from soil to root hair/from cell to cell). As water enters a cell it increases the water concentration to the cell next to it and so water will pass on into the next cell:

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