Webstomate, any of the microscopic openings or pores in the epidermis of leaves and young stems. Stomata are generally more numerous on the underside of leaves. They provide for the exchange of gases between the outside air and the branched system of interconnecting air canals within the leaf. stoma with guard cells.
Web气孔. pore uk / pɔːr/ / pɔːr/ noun. a very small hole in the skin of people or other animals, or a similar hole on the surface of plants or rocks: Sweat passes through the pores and cools …