Copy the following statements in the table A into the correct order in the table B to describe how a human inhales and exhales air. / 8 Points Table A At the same time, the intercostal muscles relax and the rib cage moves downwards. At the same time, the intercostal muscles contract, pulling the rib cage upwards and outwards. This decreases the volume of the thorax and the pressure inside increases, forcing air out of the lungs. The muscles of the diaphragm contract and pull the diaphragm downwards. The muscles of the diaphragm relax and the diaphragm returns to its domed shape. This increases the volume of the thorax and the pressure inside falls, so air enters the lungs.
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