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Plant Cells and Tissues - Coggle Diagram
Plant Cells and Tissues
Parenchyma Cells
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sructure
Most flexible, thin-walled cells.
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Can undergo cell division when mature, allowing them to repair damaged parts of plants.
Collenchyma cells
structure
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Have unevenly thickened cell walls, which allow the cells to stretch and be flexible.
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Sclerenchyma cells
structure
When they mature, they lack cytoplasm and other living components, but leaving their thick, rigid cell walls.
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Sclereids are also called stone cells, short and irregularly shaped
Fibers are needle shaped, when stacked together they form a tough elastic tissue
tissues
Dermal tissue
The layer of cells that makes up the outer covering on a plant is the epidermis.
Epidermal cells resemble pieces of a jigsaw puzzle with interlocking ridges and dips.
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Changes in the shape of guard cells(two cells that form stoma) result in the opening and closing of a stomata(To prevent water loss).
Some epidermal cells have hairlike projections called trichomes, give plant leaves fuzzy appearance which prevent insect and animal predation.
Root hairs are fragile extensions of root epidermal cells to increase root’s surface area of absorption.
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Meristematic tissue
Meristematic tissues make up meristems, or regions of rapidly dividing cells which produce new cells for plants.
Apical meristem cells: tissues at the tips of roots and stems, responsible for primary growth.
Intercalary meristem cells: found in monocot stems only, produces new cells that result in an increase in stem or leaf length.
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Ground tissue
Plant tissues that are not meristematic, dermal, or vascular tissues are ground tissues.
Consists of parenchyma, collenchyma, and sclerenchyma cells.
Functions include photosynthesis, storage, and support.
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