Evaporation
Transpiration
Respiration
Evapo-transpiration
The loss of water in the form of vapours from the aerial parts of the plant is called transpiration. Stomata are microscopic regulated pore complexes which occur in the epidermis of leaves and other soft plant organs. They are specialised for gaseous exchange. Stomata occupy only 1-2% of surface but their diffusive capacity is quite high, almost equal to the whole surface area of the leaf.
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