Name: Fruits and Seeds
Uploaded: 2019-07-19
Duration: 1 min 19 s
Description: Here's an exciting way to learn essential facts and prepare for a life science test! In this video, we'll be looking at fruits and seeds.

Question

Describe the structure and functions of the leaf with the help of a labelled diagram.

Accepted Answer

Figure: Labelled diagram of the leaf

Structure of a leaf:

The flat green part of the leaf is known as the leaf blade or lamina. It is attached to the stem by means of a short stalk called a petiole.

The region of attachment of the leaf with the stem is called leaf base. The leaf blade has many fine veins forming a network. The thick vein in the centre is called midrib.

The arrangement of veins in the leaf blade is called venation. The plants having the leaves with parallel venation always have fibrous roots. While the plants which have the leaves with reticulate venation contain tap roots.

Leaves contain a pigment called chlorophyll. This pigment imparts a green colour to the leaves.

Functions of leaf:

Manufacture of food: It is a specialized structure that makes food through the process of photosynthesis.

Gaseous exchange: It is the main site for the exchange of gases (oxygen and carbon dioxide moves in and out of the plant through stomata).

Transpiration: It helps in the transpiration process (loss of water from a plant leaf).

Vegetative propagation: In some plants, leaves bear buds from which new plants grow and develop. Example: Bryophyllum.

Describe the structure and functions of the leaf with the help of a labelled diagram.

Important Questions on Getting to Know Plants

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