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LIfe Science chapter 2, lesson 1 and 2


the main bone made up of many small bones joined together, that runs along the middle of the back in some animals


animal with a backbone or spine


animal without a backbone or spine


a hard outer covering that supports and protects some animals without backbones


to shed an animal's outer covering


organs for breathing found in fish and amphibians


one of a large group of animals with backbones that live part of their lives in water and part on land


an animals with a backbone that has dry, scaly skin


an animal with a backbone that usually has hair on its body and feeds milk to its young

Five types of vertebrates

mammal, bird, reptile, amphibian, fish


an animal with a backbone that has feathers that cover its body


an animal with a backbone that has gills and lives only in water

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