•           The animal kingdom is very large and has a variety of animals big and small which live on land and in water.

•           Animals play a very important role in our life.

Animals are found in all parts of the world—

– In tropical and polar regions

– In deserts and in water bodies

– Underground

– On mountains

– In the air

•           Some animals live inside plants, and some live in the bodies of other animals.

•           The animals are categorized into vertebrates and invertebrates.

•           Animals with backbones are called vertebrates.

•           The five classes of vertebrates are:

•           Animals without backbones are called invertebrates.

•           The most commonly known class is: