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How do Plants respire? Both plants and animals respire, but plants respire at a considerably lower rate than animals. Although in photosynthesis large amounts of gas is exchanged, leaves are adapted to control this situation. All cells in a plant respire, as it is necessary to break down glucose in order to release energy and therefore carbon dioxide. Leaves In leaves, gas exchange (and loss of water vapour in transpiration) occurs through pores call the stomata, or if a singular pore, a stoma. They are light sensitive and usually open in the morning when light hits them, and close in the night. Otherwise, what opens and closes the stomata depends on whether the guard cells of the leaves are turgid or flaccid. There are two guard cells to each stoma, and when they are turgid, they bulge out and force the inner walls into a crescent shape, opening the stoma. What actually makes...

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