Changes

: '''Arteries''' have a thick layer of [[muscle]] to cope with the high [[pressure]] of the [[blood]].: '''Arteries''' have a several layers of elastic wall [[tissue]] which can stretch to cope with the high [[pressure]] of the [[blood]].{| class="wikitable"|-|[[File:Artery.png|center|300px]]|-| style="height:20px; width:200px; text-align:center;" |A [[diagram]] of an [[artery]].|}