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To breathe is a skeleton and muscular chest, chest section is as breath several muscle contraction causes the thoracic section of the extended forward and lift up on at the same time, the diaphragm is lower. Both actions make your chest cavity enlarges more and more large. When the เนึ้อ muscles stopped working and the sunken chest and abdominal pressure is pressure diaphragm back up in the original style. For example, this process causes pressure in the lungs increases. When the pressure in the lungs increases higher than the pressure of the atmosphere. The air is pushed out of the lungs, consequently concluded that the first factor that makes. The air is moving out from the lungs. Caused by different pressure exerted
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