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Plasmodesmata. Plasmodesmata (singular, plasmodesma) are small channels that directly connect the cytoplasm of neighboring plant cells to each other, establishing living bridges between cells.
Gap junctions and plasmodesmata are specialized sites of communication between adjoining cells in animals and plants respectively. Gap Junctions. Gap junctions readily allow the passage of small molecules and ions required for rapid communication (such as heart tissue), but do not allow the passage of larger molecules such as proteins.