The Symplast Pathway: Sym- meaning with or in and -plast meaning main part, the Symplast pathway involves the flow of water between the cytoplasm of cells, through the plasmodesmata.
The Apoplast Pathway: Apo- meaing away from and -plast meaning main part, the Apoplast pathway involves the flow of water away from the cytoplasm and through the cell walls of the parenchyma, which are essentially dead. It eventually meets the casparian *****, and must briefly pass through a selectively permeable membrane.
The Vacuolar Pathway: Similar to the Symplast pathway, but the water can flow through the vacuoles as well as the cytoplasm.
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