Changes

[[File:LeafCrossSection.png|right|300px|thumb|The '''two guard cells''' can be seen at the top of this [[leaf]].]]A '''guard cell''' is a [[Specialised Cell|specialised cell]] in a [[plant]] [[leaf]] which contains can change shape to allow or stop gases [[gas]]es from getting into the [[leaf]].

: There are more '''guard cells''' found on the bottom of the [[leaf]] than the top.: [[Photosynthesis]] needs water, so '''guard cells''' are there to make sure the [[leaf|leaves]] don't use up too much [[water]] and die of [[Dehydrate|dehydration]].: '''Guard cells''' fill with water to become [[turgid]], making the [[stoma|stomata]] larger. This makes allows [[Carbon Dioxide|carbon dioxide]] into the stoma larger[[leaf]] for [[photosynthesis]]. : When the [[leaf]] gets dehydrated the '''guard cells''' become [[flaccid]]. This makes making the [[stoma |stomata]] smaller.This stops [[Carbon Dioxide|carbon dioxide]] from getting into the [[leaf]] and prevents [[photosynthesis]]

|[[File:GuardCellDiagramGuardCellClipart.png|center|600px300px]]|[[File:GuardCellFlaccidClipart.png|center|200px]]|-| style="height:20px; width:300px; text-align:center;" |[[Turgid]] '''guard cells''' are full of [[water]] and have a hole called a [[stoma]] between them to allow air in and out.| style="height:20px; width:250px; text-align:center;" |[[Flaccid]] '''guard cells''' are [[dehydrated]] and the [[stoma]] is blocked stopping air form getting in or out of the [[leaf]].