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science test

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
what does the ribcage do   protects the lungs  
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why do we need to breathe   we need to breathe because we dint hold oxygen in our body so we need it to survive  
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what is bad stuff in our body   carbon dioxide  
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circulatory system   it transports blood to the heart  
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respiratory system   series of organs responsible for taking oxygen  
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blood vessles   arteries capillaries viens  
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Created by: doglover25
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