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===About Guard Cells===
: '''Guard cells''' are shaped with a gap between them called a [[stoma]].
: 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 allows [[Carbon Dioxide|carbon dioxide]] into the [[leaf]] for [[photosynthesis]].
===Meaning===
A '''guard cell''' is a [[Specialised Cell|specialised cell]] in a [[plant]] [[leaf]] which can change shape to open or close a hold in the [[leaf]] called a [[stoma]] allowing or preventing [[gas]] exchange.
===Adaptations of the Guard Cell===
: '''Guard cells''' can change shape to open and close a hole called a [[stoma]].
===About Guard Cells===
: '''Guard Cells''' are essential to control the rate of [[photosynthesis]] and [[transpiration]].
: When '''guard cells''' become '''flaccid''', due to [[dehydration]], the [[stomata]] close and [[Water Vapour|water vapour]] can no longer escape the [[leaf]]. This stops [[transpiration]], preventing further [[water]] loss. The closed [[stomata]] also prevent [[Carbon Dioxide]] from entering the [[leaf]], stopping [[photosynthesis]] and conserving [[water]] (which is needed for [[photosynthesis]].
: There are more '''guard cells''' found on the bottom of the [[leaf]] than the top.
{| class="wikitable"
|-
|[[File:GuardCellClipart.png|center|300px]]
|[[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]].
|}