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Class 6 Science - Lesson: Getting To Know Plants

Parts of a plant

There are two main systems in a plant. These are:
  1. The root system and
  2. The shoot system


The root system contains roots and root hairs and remains under the soil in most of the plants. While the shoot system remains erect (upright) above the soil and it has stem, leaves, flowers and fruits.

Watch the video on parts of a plant:

Roots

The part of the plant that remains under the soil in most of the plants is called the root. It helps in fixing the plant firmly into the soil and thus helps it to stand erect (upright) above the soil.

Roots absorb water and the dissolved minerals from the soil which are used for preparing food. They also store the extra food in them which is used by the plant when required.

Stem

The part of the plant that remains erect (upright) above the soil is called the stem. It supports all the other parts of the plant.

It helps in conducting (carrying) water and dissolved minerals from the roots to leaves where the food is prepared. Stems also conduct the prepared food (simple sugars) from the leaves to other parts of the plant.

In some plants like potato the stem performs additional function like storing food.

Leaves

These are the most important part of the plant. Most of the leaves are green in color due to the presence of the green coloring pigment called chlorophyll which is capable of capturing light energy from the sun and convert it into chemical energy in the form of food.

In most of the plants, food (carbohydrate) is prepared in the leaves through a process called photosynthesis.

Flowers

Flower is the most colorful and attractive part of the plant. It is the reproductive part of the plant. The male reproductive part of the flower is the pollen grain (pollen) and the female reproductive part is the ovary which contains ovules.

After pollination and fertilization of the ovary develops into a fruit while the ovules develop into seeds. These seeds grow into new plants under favorable conditions.

Fruits

The fleshy edible (eatable) part of the plant which has seeds within it is called the fruit which stores the food prepared by the plant. Seeds are embedded within the fruits and develop into new plants.

Classification of plants

Based on the height of the plant, texture of the stem and certain other characteristics all the plants are mainly divided into three categories viz.
  1. Herbs
  2. Shrubs
  3. Trees
Watch this presentation learn about kinds (classification) of plants in detail: