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 what is the function rib cage

Hi,
 
Functions of rib cage are:
 
It protects the various vital organs such as heart and lungs. If the rib cage gets broken or damaged, it causes injuries to the lungs and the heart.
 
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 The rib cage serves two functions. It primary function is protection for the heart and lungs. Without this protection fatal damage could too easily occur. The second and far lesser function is in being part of the system (with the intercostal muscles) to pull the chest up to increase negative pressure on the lungs and draw in breath.

 
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