'How are animals classified?' Animal World part 8

 Hello friends in this article you are going to read our Animal World series.

So, how many animals you know, maybe 50, 70, or hundreds, whatever the list of the animals would be long. There are innumerable number of animals all around the globe. But we have ways to classify them.

There are millions of different kind of animals and they are broadly divided into two categories. Animals with backbones or vertebrates and animals without backbone or invertebrate.Some common vertebrates are cats, dogs, horses, fishes, humans, etc. Jellyfishes, octopuses, squids are some examples of invertebrates. 

There are four types of vertebrate. They are mammals, birds, amphibians, fishes and reptiles. But out of millions of animals on Earth 97% of them are just invertebrates. There are three types of invertebrates they are insects, spiders and worms. Some of the major groups in invertebrates are Ponifera, Cnidaria, Platyhelminthes, Mollusca, Annelida, Echinodermata and Anthropoda.

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