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The '''rib cage''' is the part of the [[skeleton]] in most [[mammal]]s that surrounds the [[lungs]]. It is composed of paired [[bone]]s. In humans the rib cage consists of 12 ribs.<ref>http://encyclopedia2.thefreedictionary.com/Ribcage</ref>
The '''rib cage''' is the part of the [[skeleton]] in most [[mammal]]s that surrounds the [[lungs]]. It is composed of paired [[bone]]s. In humans the rib cage consists of 12 pairs of ribs.<ref>http://encyclopedia2.thefreedictionary.com/Ribcage</ref>
==References==
==References==