Stomata: In botany, stomata are tiny openings or pores, found mostly on the underside of a plant leaf and used for gas exchange. The pore is formed by a pair of specialized parenchyma cells known as guard cells which are responsible for regulating the size of the opening.
Air containing carbon dioxide enters the plant through these openings where it is used in photosynthesis and respiration. Oxygen produced by photosynthesis exits through these same openings. Also, water vapor is released into the atmosphere through these pores in a process called transpiration.
Also Known As: stoma stomate