Air enters the body through the nose or mouth, The air goes down the windpipe and into the lungs, The ribs move upwards and outwards, The chest gets bigger and the lungs fill with air, The diaphragm muscle contracts and moves downwards, The diaphragm muscle relaxes and moves upwards, The chest gets smaller and air is pushed out of the lungs, The ribs move downwards and inwards, Air from the lungs moves up the windpipe, Air leaves the body through the nose or mouth.

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