Which part of a plant works as its nostrils

Plants respire all the time, day or night. However, they only photosynthesize during the day, when the sun is out. Every part of a plant breathes. It "inhales" oxygen through pores along the entire length of the plant, from the roots to the flowers. The roots get oxygen from air pockets in the surrounding soil. The plant "exhales" carbon dioxide the same way.

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