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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