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What are Guard Cells and Epidermal tissue?

Answer»

A guard cell is an epidermal cell that can open the stomata to take in or release oxygen, carbon dioxide and water, consequently enabling these molecules to travel through the stomata. Guard cells are shaped like kidneys or sausages and the walls NORMALLY vary in rigidity.


Epidermis, in botany, outermost, protoderm-derived layer of cells covering the stem, root, leaf, flower, fruit, and seed parts of a plant. The epidermis and its waxy cuticle provide a protective barrier against MECHANICAL INJURY, water LOSS, and INFECTION.



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