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  1. Dictionary
    Guard cell
    /ɡärd sel/

    noun

    • 1. each of a pair of curved cells that surround a stoma, becoming larger or smaller according to the pressure within the cells.

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    • Specialized plant cells

      • Guard cells are specialized plant cells in the epidermis of leaves, stems and other organs that are used to control gas exchange. They are produced in pairs with a gap between them that forms a stomatal pore.
      en.wikipedia.org › wiki › Guard_cell

      Guard cell - Wikipedia

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  4. en.wikipedia.org › wiki › Guard_cellGuard cell - Wikipedia

    Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing. Each guard cell has a relatively thick and thinner cuticle on the pore-side and a thin one opposite it.

  5. www.microscopemaster.com › guard-cellsGuard Cells - Definition, Function, Structure of Stomata on ...

    Definition: What is a Guard Cell? Essentially, guard cells are two bean-shaped cells that surround a stoma. As epidermal cells, they play an important role in gaseous exchange in and out of plant leaves by regulating the opening and closing of pores known as a stoma.

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  7. www.sciencefacts.net › guard-cellsGuard Cells: Definition, Functions, & Diagram - Science Facts

    Jun 18, 2021 · Guard cells are a pair of bean-shaped cells found in the epidermis of leaves and young stems of plants. They look similar to a kidney and exist in pairs surrounding a tiny gas exchange opening called a stoma. Guard cells help plants to perform photosynthesis, get rid of wastes, and excess water.

  8. biologyreader.com › guard-cells-in-plantsGuard Cells in Plants - Definition, Structure, Adaptations ...

    In plants, guard cells refer to the protective layer around a stoma that facilitates gas exchange between the plant cells and surrounding. Several pores are found in the leaves, and the cross-sectional view of the leaf cells to let us know the location of guard cells.

  9. www.ck12.org › flexi › biologyFlexi answers - What are guard cells? What are their ...

    Guard cells are specialized cells in the epidermis of leaves, stems, and other organs that are used to control gas exchange. They are produced in pairs with a gap between them that forms a stomatal pore.

  10. www.cell.com › current-biology › fulltextGuard cells: Current Biology - Cell Press

    Aug 7, 2001 · What are guard cells? A pair of guard cells surrounds each stoma on the leaf surface. Stomata are important because they regulate the uptake of CO 2 from the atmosphere for photosynthesis and also the loss of water vapour from the plant during transpiration.

  11. asknature.org › strategy › guard-cells-regulate-gas-and-How Guard Cells Function — Biological Strategy — AskNature

    May 2, 2020 · Guard cells are a pair of two cells that surround each stoma opening. To open, the cells are triggered by one of many possible environmental or chemical signals. These can include strong sunlight or higher than average levels of carbon dioxide inside the cell.

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