In this unit we are going to learn more things about vertebrate animals. I guess you already know many things about them. But...

  • do you know that some turtles can live for more than 100 years?

  • do you know that frogs can breathe not only with their lungs but also through their skin?

  • do you know that there are aproximately 62,000 species of vertebrates?

  • do you know that only the 10% of all the animals in the world are vertebrates?

  • do you know that humans and chimpanzees are the only animals that can recognize themselves in a mirror?

So click on each word and be ready to learn more interesting things about vertebrate animals.