Functions of Leaves

The main function of leaves is photosynthesis, which is the process by which plants prepare their own food. During photosynthesis, leaves use:

Carbon dioxide from the air
Water from the soil
Sunlight as energy
Chlorophyll present in the leaves

Using these components, plants produce food and release oxygen into the atmosphere.

Leaves also help in transpiration, which is the loss of water vapour from the surface of leaves. This process helps in cooling the plant and maintaining water balance.