plants have stomata so they can exchange gases with their environment for photosynthesis
guard cells
cells that surround stomata in a plant's epidermal tissue
plants guard cells
open and close stomata to control gas exchange and water loss from the plant
to open a plant's stomata guard cells fill with water and become turgid which makes them bend apart to close a plants stomata guard cells losewater and become flaccid which makes them come together
