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| style="height:20px; width:200px; text-align:center;" |[[Muscle]]s are [[organ]]s that allow the body to move.
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==Key Stage 4==
===Meaning===
An [[organ]] is a part of an [[organism]], made of several [[tissue]]s, that does a specific job.
===About Organs===
: [[Organ]]s are made of more than one different [[tissue]]s that work together.
: Only [[multicellular]] [[organism]]s can have [[organ]]s because [[tissue]]s are many of many [[Cell (Biology)|cells]].
: An [[organ]] may have more than one job.
: Many [[organ]]s working together for the same purpose form an [[Organ System|organ system]].