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In vascular plants, phloem is the living tissue that transports the soluble organic compounds made during photosynthesis (known as photosynthate), in particular the sugar sucrose,[1] to all parts of the plant where needed. This transport process is called translocation.[2] In trees, the phloem is the innermost layer of the bark, hence the name, derived from the Greek word φλοιός (phloios) meaning "bark".

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