structure of stomata
Answers
Structure of Stomata:-
Stomata are present in leaf epidermis
they regulate the process of transpiration and gaseous exchange
They are enclosed by two bean-shaped guard cells
The size and shape of stomata vary in different plants. The structure of the stomata consists of a kidney shaped epidermal cell with an opening in the centre known as the pore. The stomata are bordered by a pair of specialised parenchyma cells known as the guard cells that are responsible for regulating the size of its opening, thus saving the plant from water loss. When fully stretched, the guard cells expand and thereby open the stomata. When the guard cells lose water, they shrink and the stomata will close. Guard cells also have large vacuoles. The cells that surround the guard cells are known as subsidiary or accessory cells.