Stomata are tiny pores present on the surface of leaves and stems of plants. It performs the following function:

•It facilitates the exchange of gases between plant and its surroundings. It is through stomata that plant release oxygen and take up carbon dioxide.

•It helps the plant to get rid of excess water through transpiration. The stomata also close down to prevent loss of water. Thus, it regulates the water content in plant cells.

The figure for stomata is given below: