An ==Key Stage 2=====Meaning===The [[brain]] is an [[Organ|organ]] which can think and is found in the [[head]] of [[Animal|animals]]. ==Key Stage 3=====Meaning===The [[brain]] is an [[organ]] in the [[Nervous System|nervous system]]. ==Key Stage 4=====Meaning===The [[brain]] is part of the [[Central Nervous System|central nervous system]] which processes information sent by [[nerve]]s. ===About the Brain===: The [[brain]] is responsible for coordinating the [[muscle]]s and [[gland]]s around the body.