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Directions:Put the statements in order to show how air enters the human body. Write numbers 1 to 5.
___1. The bronchi subdivide many times inside the lungs,forming the hair like tubes called bronchioles.
___2. Air enters the body through bthe nose nasal passage,and then through the windpipe or trachea,which divides into two branches called bronchi.
___3. When you breathe in or exhale,the diaphragm muscle contracts.
___4. The diaphragm helps the air go in and out of the lungs.
___5. When you breathe out or exhale, diaphragm muscle relaxes.