• Respiratory and circulatory systems
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  • Which are the parts of the respiratory system? (Name them in order)
    Nose, mouth, pharynx, trachea, lungs, bronchi, alveoli and diaphragm
  • When we breathe in...
    Our diaphragm contracts and moves down./ The rib cage moves up and out./ The lungs expand
  • When we breathe out...
    Our diaphragm relaxes and moves up./ The rib cage moves in and down./ The lungs contracts
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