Small openings in leaves called stomata must stay open to allow uptake of carbon dioxide the evaporation of water, to take place.
A sub-atmospheric intrapleural pressure that is lower than the intrapulmonary pressure results from the absence of air in the intrapleural space. Consequently, there is a pressure difference between the In plant tissue, stomata are microscopic pores that facilitate gas exchange. Although some stems also have stomata, they are typically found in plant leaves. To open and close stomatal pores, specialized cells called guard cells to surround stomata. A plant's stomata enable it to absorb carbon dioxide, which is essential for photosynthesis. By closing when it's hot or dry, they also aid in reducing water loss. Stomata resemble tiny mouths that open and close to help the body sweat.
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