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The ribcage and skull both protect internal organ.the bones of the ribcage can move whereas those of the skull cannot .what are the advantages of movement

and lack of movement respectively.


Advantages of movement of rib cage is that it can be large or small with the need of oxygen or for any other work.
advantages of lack of movement of skull is that it gives a harder body and a good covering for this the skull becomes less affective to outer attacks.

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