Transpiration is the movement of water through a plant and its evaporation from leaves, flowers, and stems. Leaves sport tiny pores known as stomata as an exit. This process is necessary to allow the diffusion of carbon dioxide from the air to photosynthesis. It is also known to cool plants, change osmotic pressure, and enable nutrients and water to flow from the plant's roots to its shoots. Here, a Japanese maple indicates a lack of transpiration due to a lack of leaves.
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