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==Key Stage 3=====Meaning===The [[trachea]] is a tube connecting the [[mouth]] to the [[Lung|lungs]].{| class="wikitable"|-|[[File:Trachea.png|center|200px]]|-| style="height:20px; width:200px; text-align:center;" |A diagram showing the [[trachea]].|}  ===About the Trachea===: The [[trachea]] is covered in [[cartilage]] to stop it from closing when the lungs take in [[Oxygen]].: The [[trachea]] splits into two smaller pipes called [[Bronchus|bronchi]].