Simplify the following text for a Grade 10 native English-speaking person.
Original: Stomatal transpiration accounts for most of the water loss by a plant , but some direct evaporation also takes place through the surfaces of the epidermal cells of the leaves .
Simplified: Stomatal transpiration accounts for most of the water loss by a plant , but some direct evaporation also takes place through the cuticle of the leaves and young stems .