.The mechanism while breathe (Inspiration) is the muscle strip ribs outside will shrink. The rib bar in the muscle is relaxed The ribs are piled up sternum (sternum) will rise, front and side of the chest expand.Decreased lung off the diaphragm. Flat down, stomach bulging out
.The mechanism while breathing out (Expiration) is the muscle contraction muscle strips in the ribs and rib strip outside the relaxed. The ribs and sternum lower down, the diaphragm (diaphragm) diastolic pressure of the chest and lung higher collapsed lung.
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