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• Nose



                 When we breathe the air passes through our



                 nose.



                 There are tiny hairs present inside our nose



                 which prevents the dust and germs in the air



                 from entering our lungs.









                 • Windpipe



                 The windpipe or trachea is a hollow tube



                 that connects to the lungs.



                 The air then enter the lungs through the



                 windpipe.
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