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A tissue composed of living cells with thickened cell walls capable of stretching that fit rather closely together; found in young stems and petioles
Region of primary tissue in a stem or root bounded externally by the epidermis and internally in the stem by the phloem and in the root by the pericycle; develops from the primary meristem, the ground meristem
Dermal Tissue System
Consists of the outer tissues of the plant body, epidermis (a primary tissue) and the periderm (a secondary tissue); functions to protect the plant body from drying, pathogens, and insects
A superficial layer of cells occurring on all parts of the primary plant body: stems, leaves, roots, flowers, fruits, and seeds; it is absent from the root cap and is not differentiated on the apical meristems
Tan elongated, tapering, thick-walled strengthening cell occurring in various parts of plant bodies; one of the cell types in sclerenchyma tissue
Ground Tissue System
Tissues of the plant body responsible for housekeeping functions, for example, storage, support, photosynthesis, and others; collenchyma, sclerenchyma, and parenchyma
Specialized epidermal cell found on young stems and leaves; between each pair of guard cells is a small pore through which gases enter or leave; a pair of guard cells in addition to the pore constitute a stoma
Sites in the plant body where cells divide and where differentiation into specialized cells and tissues is initiated
A tissue composed of cells that perform housekeeping functions such as photosynthesis and storage of water and other substances; cells usually have thin walls of cellulose, and often fit rather loosely together, leaving intercellular spaces
Protective tissue that replaces the epidermis after secondary growth is initiated; consists of cork, cork cambium, and phelloderm
Food-conducting tissue, consisting of sieve-tube members with companion cells or sieve cells, phloem parenchyma, and fibers
Meristems of the shoot or root tip giving rise to the primary tissues—protoderm, ground meristem, and procambium
Tissue that forms from primary meristems (epidermis, xylem, phloem, and ground tissues)
A primary meristem that gives rise to primary vascular tissues and, in most woody plants, to the vascular cambium
A type of sclerenchyma cell with a heavily lignified cell wall; can have a variety of shapes
A strengthening tissue composed of cells with heavily lignified cell walls; two main cell types are fibers and sclereids
Tissue formed by division of the vascular cambium, usually toward the outside of the organ
Tissue formed by division of the vascular cambium, usually toward the inside of the organ; main component of wood
Sieve Tube Member
The main type of conducting cell in the phloem of flowering plants; connected to other sieve tube members by sieve plates; specialized for the conduction of food materials
Stoma (pl. stomata)
A minute opening plus two guard cells in the epidermis of leaves and stems, through which gases pass
An elongated, tapering xylem cell with lignified pitted walls, adapted for conduction and support, and without open end walls; found mainly in ferns and gymnosperms
A strand of tissue containing primary xylem and primary phloem (and procambium, if present) and frequently enclosed by a bundle sheath of parenchyma or fibers
Cambium giving rise to secondary phloem and secondary xylem; associated with secondary growth in woody plants
A conducting cell in the xylem of flowering plants; typically have a lignified secondary cell wall and open end walls, joined end to end by opened perforation plates to form vessels; specialized for water transport
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