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Tree biology

Contents: - periderm - phellem - cork cambium - phelloderm - cortex - phloem- phloem rays - sieve tube element - companion cells - cambial zone (cambium) - bark - xylem - growth ring - vessels - tyloses - parenchyma - axial parenchyma - multiserrate ray parenchyma - uniserrate ray parenchyma - fibers - symplast - apoplast - growth ring/ray compartment -wounding response - decay development

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tree biology

The cambial zone or cambium is an area of dividing cells that differentiate into xylem (toward the inside) and phloem (toward the outside). It is on the move outward as the tree grows. Once xylem cells divide into their various components they can not move.