Question

explain structure and function of stomata

Answer 1

Structure:

The stomatal pores are very minute and are covered with crescent shaped guard cells.

Outer wall of guard cells are thin and the inner wall is thick. Each guard cell contains cytoplasm, a nucleus and plenty of chloroplasts.

There is a single large air chamber below the stomatal pore.

Functions of stomata:

The gaseous exchange (CO2and O2) between the intercellular spaces of plant cell and the outer air takes place through stomata during photosynthesis

During respiration plants receive O2 and release CO2through stomata.

Answer 2

We can observe small pores here and there in the epidermis of the leaf. These pores are called Stomata. Stomata are enclosed by two kidney shaped cells called guard cells.

Stomata are necessary for exchanging of gases with the atmosphere. Transpiration also takes place through Stomata.