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What will hurt your respiratory system?

Updated: 8/17/2019
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12y ago

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Asthma does because it swells the bronchi and your muscles tighten. Colds also hurt te respiratory system because you get more mucus then you should have and you cough and sneeze to get rid of pathogens. Smoking does to it paralyzes cilia.

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12y ago
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Q: What will hurt your respiratory system?
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