What are invertebrates? Animal World part 13

 In some of the previous articles (which contained of part 8 and part 9 ) we read about invertebrates, but there wasn't a lot of information regarding to them. But now in this article and next articles, you are going to red about invertebrates in deep. So let's start.

Now if you have ever seen a human skeleton, then you know that it contains backbone, and we humans and other vertebrates (animals with backbone) can't survive long without our backbone. We are able to walk because of backbone. But there are animals which don't have backbone. These are called invertebrates. Of millions of species in this Earth around 97% of them are invertebrates. Common examples of invertebrates are insects, spiders, snails, clams worms and molluscs. 

But body structure of animals in the all Earth is not same. Even though a bear and caterpillar are animals but their body structures are very different.

In animal kingdom, invertebrates are actually the largest group. The total number of invertebrate species are around 30 million. But vertebrates are only around 60,000 to 70,000. Invertebrates include animals both on land and in water. 

Invertebrates have a long history, fossil records show invertebrates existed even 600 million years ago, which is even before dinosaurs. Invertebrates are also the major food source of animals like birds and fishes, you may have seen fishes and birds eating worms and insects. Invertebrates play a major role in life of vertebrates.

Many of the invertebrates work like pests and parasites such as grasshoppers and ladybug.

So lets summarize this article-

1. Invertebrates are animals without any backbone.

2. There is a lot of difference between body structure of vertebrates and invertebrates.

3. Most animal life on the planet is invertebrates, they have 30 million species in them.

So that's it for today guys hope you enjoyed, if yes then show your support by sharing this article with your friends.