Vertebrates and Invertebrates

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LIfe Science chapter 2, lesson 1 and 2

backbone

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

vertebrate

animal with a backbone or spine

invertebrate

animal without a backbone or spine

exoskeleton

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

molt

to shed an animal's outer covering

gills

organs for breathing found in fish and amphibians

amphibians

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

reptile

an animals with a backbone that has dry, scaly skin

mammal

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

bird

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

fish

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

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