Tuesday, October 19, 2010

Do you know how scientists classify the animal kingdom? Well they classify the animal kingdom into categories based on their characteristics. The two biggest categories are Vertebrates and Invertebrates.

Vertebrates have a backbone such as reptiles, amphibians, birds fish and mammals. Humans are mammals too because they have a backbone, warm blooded and when they are young their mothers feed them milk.

Invertebrates have no backbone. They make up 97% of the animal kingdom and are comprised of 7 groups. Arthropods-exoskeleton, annelida- worms and mollusc's there soft bodied Invertebrates, like snails and slugs. That’s three groups.

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