Functions of Secondary Growth
Meristems: Embryonic tissue regions, primarily concerned with formation of new cells. (primary and secondary)
procambium :A primary meristematic tissue that gives rise to primary vascular tissues.
vascular cambium: A cylindrical sheath of meristematic cells that divides toproduce secondary phloem and secondary xylem.
secondary growth: In plants, growth derived from secondary or lateralmeristems, the vascular cambium and cork cambium, that results in anincrease in girth; in contrast to primary growth, which results in an increase in length.
periderm: Outer protective tissue thatreplaces epidermis when it is destroyed during secondary growth; includescork, cork cambium, and phelloderm.
heartwood: Nonliving and commonly dark-colored wood in which no watertransport occurs; it is surrounded by sapwood.
sapwood: Outer part of the wood of a stem or trunk, usually distinguished fromthe heartwood by its lighter color; part of woody stem in which conductionof water takes place