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==Key Stage 3==
===Meaning===
The '''rib cage''' is the [[bone]]s in our [[thorax]] which serve to protect the [[lungs]] and [[heart]].
===About the Rib Cage===
==Key Stage 4==
===Meaning===
The '''rib cage''' is the [[bone]]s in our [[thorax]] which serve to protect the [[lungs]] and [[heart]] as well as expand and contract to allow [[breathing]].