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The World of Animals Imagine what would the world be if there were no animals in the jungles, no birds chirping in the morning, no honey bees making honey, no fishes in the ponds, no trees, flowers and fruits. Our surroundings would be empty. Animals
play a very important role in our life. The surroundings in which they
live and grow is called Environment. The animal kingdom is very large and
has a variety of animals big and small which are found on land, in water
and in air. They have different shapes and size. We study about these animals
in the branch of Biology called Zoology. Since these animals are our natural
resources, we should try our best to protect them and see that
they are not killed. They need our love and care.
Animals are very helpful to us
Animals are unique in their looks and characteristics. Observe some animals in your locality. Do they have the same number of legs and a similar body structure? Compare your body parts with theirs. Each type is different from the other. A lion is very different from a cow and a dog does not have the same features as a cat. All living things have some common characteristics. How do we classify animals? They are classified on basis of the different types of characteristics they posses. 1. Invertebrates Animals which don't have a backbone or skeleton, are called Invertebrates.
Animals which have a backbone or a bony skeleton, are called vertebrates.
a. Organs of Movement Animals can move in different ways from one place to another in search of food and shelter and have different types of body organs. Land Animals Land animals have four limbs.
They have fins, webbed feet and paddle-like limbs.
Birds
have wings, which help in flying. The fore limbs (front) of birds are converted
into wings, which have feathers.
Insects Some
insects have one or two pairs of wings for flying e.g. butterfly. The wings
are different from those of birds, as they have no feathers. They are made
of tiny colored scales. Some have six legs for movement, e.g. cockroaches
and ants. Grasshoppers use hind legs.
Animals eat different types of food and have different types of feeding organs. They are classified on basis of the types of food they eat.
So
that animals remain healthy, grow and get energy to survive and protect
themselves from enemies.
c. Breathing Organs
Animals
get oxygen while breathing, which burns the food within their bodies and
they get energy to do work. Now, an activity for you!
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