Vascular Cambium, Secondary Phloem and Xylem



The vascular cambium arises from the pericycle and the procambium located between the primary phloem and xylem tissues. It forms a thin concentric layer of undifferentiated cells that give rise to secondary phloem tissue toward the outside of the root, and secondary xylem tissue toward the inside of the root.


Root Secondary Growth XS

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Roots Secondary Growth