Structure of Leaves

Leaf Parts

• 1. Blade: The broad, flat part of the leaf that is optimized for capturing sunlight.
• 2. Petiole: The stalk that attaches the leaf to the stem, allowing it to capture sunlight.
• 3. Veins: The vascular network that transports water, nutrients, and sugars throughout the leaf.

Leaf Types

• 1. Simple Leaves: Have a single blade attached to the stem.
• 2. Compound Leaves: Have multiple leaflets attached to the petiole.

Function of Leaves

Photosynthesis

Leaves are the primary location for photosynthesis, the process by which plants produce food using sunlight, carbon dioxide, and water. The chlorophyll in the leaf captures sunlight and uses it to convert carbon dioxide and water into glucose and oxygen.

Gas Exchange

Leaves also facilitate gas exchange, allowing the plant to take in carbon dioxide for photosynthesis and release oxygen as a byproduct.

Transpiration

Through tiny openings called stomata, leaves release excess water in a process known as transpiration. This helps maintain the plant's water balance and facilitates the transport of water and nutrients from the roots to the rest of the plant.