Medicines - We take these to make us better when we are ill., Germs - They cause infectious diseases., Vaccinations - Injections that stop us from getting some diseases., Instructions - These tell us how to take medicines correctly., Frame - Something that gives support and shape from the inside, Muscles - Parts of the body that are joined to bones and allow us to move, Relax - When muscles get longer and thinner. Muscles feel soft when they relax, Vertebrate - An animal that has a backbone or spine, Exoskeleton - The hard skins or shells on the outside of the bodies of some invertebrates, Contract - When muscles get shorter and fatter. Muscles feel hard when they contract,

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