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The top documents tagged [lungs supply oxygen]
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lungs supply oxygen
Science Around Us Book 4.doc
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Science Around Us Book 4.doc
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Chapter 1 Lesson 4. What does the digestive system do? It breaks down food into materials the body can use.
218 views
Name 3 things you like about being physically active? Life is like exercise. The harder it is, the stronger you will become!
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The Respiratory System. The main function of the respiratory system is to take in oxygen and get rid of carbon dioxide. It works closely with the circulatory.
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