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| style="height:20px; width:200px; text-align:center;" |The '''muscles''' under the skin of a sheep.
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==Key Stage 3==
===Meaning===
[[Muscle]]s are [[organ]]s in the [[Muscular System|muscular system]] which allow us to move.
===About Muscles===
: Most muscles come in [[antagonistic]] pairs. This means when one contracts the other must relax.