Leaves |
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StomataAll leaves have tiny pores that are used for gas exchange. These pores are called stomata (singular: stoma), and are usually found on the underside of a leaf. To prevent dehydration through open pores, a pair of guard cells surrounds each stoma to regulate its opening and closing. At this exhibit, you can see clear pictures of stomata and guard cells underneath a microscope. |
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A microscopic view of a stoma and its guard cells: ![]() The guard cells are green since they contain chloroplasts. |
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![]() Why use this plant? Although all plants have stomata, the purple background of this plant makes it easier to see the green gaurd cells and pores. |
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