Revise: Transport systems - PlantsPhloem transport system
Multicellular organisms require transport systems to supply their cells and remove waste products. Plants transport substances through xylem and phloem.
Sugar produced by photosynthesis in the leaves is transported up and down the plant to the meristems and other tissues in living phloemThe tissue in plants that transports the products of photosynthesis, including sugars and amino acids. cells.
Companion cells provide the energy for the sieve cells. The end walls of the sieve cells have pores through which sugar is transported from cell to cell.