Leaf and its Structure

Table of Contents

• Leaf
• Structure of Leaf
  • Lamina
  • Petiole
  • Stomata
  • Veins
• Summary
• What’s Next?

In the previous segment, we learnt about Stems and their functions. In this segment, we will study about the Leaf and its structure.

What is a Leaf?

• The Leaf is a thin, flat structure which is mostly green in colour due to the presence of chlorophyll.
• Chlorophyll is a green-coloured pigment which plays a chief role in the process of photosynthesis.

What is the basic structure of a leaf?

1. The basic structure of a leaf is made up of a stalk, a blade, and a petiole.

2. The stalk is the part of the leaf that attaches it to the stem of the plant.

3. The blade is the broad, flat part of the leaf that catches sunlight.

4. The petiole is the stalk that connects the blade to the stem.

Lamina

A lamina is a thin sheet of material, usually metal, plastic, or paper. It is often used to cover or protect something else, such as a document or a picture. Lamination can also refer to the process of bonding two or more sheets of material together, usually by heat and pressure. This creates a thicker, stronger material that is less likely to tear or rip. Lamination can be used to protect documents and pictures from damage, and to make them look more attractive. It can also be used to create a waterproof or weatherproof barrier.

Petiole

A petiole is the stalk that attaches a leaf to a stem. It is typically slender and cylindrical. The petiole provides support for the leaf and allows nutrients and water to move between the leaf and the stem.