1. What is respiratory system?
2. What are the functions of the respiratory system?
3. What are the parts of the respiratory system and the functions of each?
4. What happens when you breathe in and breathe out?
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1. What is respiratory system?
2. What are the functions of the respiratory system?
3. What are the parts of the respiratory system and the functions of each?
4. What happens when you breathe in and breathe out?
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Answer:
define plate tectonics