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==Key Stage 3==
[[File:BreathingSystemSimple.png|right|300px|thumb|This [[diagram]] shows the position of the '''diaphragm''' in the [[Breathing System|breathing system]].]]
===Meaning===
The [[diaphragm]] is a wall of [[muscle]] separating the [[organ]]s in the [[thorax]] from the [[organ]]s in the [[Abdomen (humanHuman)|abdomen]].
===About the Diaphragm===
==Key Stage 4==
[[File:BreathingSystemSimple.png|right|300px|thumb|This [[diagram]] shows the position of the '''diaphragm''' in the [[Breathing System|breathing system]].]]
===Meaning===
The [[diaphragm]] is a wall of [[muscle]] separating the [[organ]]s in the [[thorax]] from the [[organ]]s in the [[Abdomen (humanHuman)|abdomen]]. ===About the Diaphragm===: The [[diaphragm]] is essential to allow [[vertebrate]]s to [[breath]] [[air]].: When [[vertebrate]]s [[inhale]] the [[diaphragm]] contracts and when they [[exhale]] the [[diaphragm]] relaxes.{| class="wikitable"|-|[[File:Breathing.gif|center]]|-| style="height:20px; width:400px; text-align:center;" |An animation of the lungs inhaling and exhaling.|} ===References=======AQA==== :[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f216 ''Diaphragm (contraceptive), pages 217, 219, GCSE Biology; Student Book, Collins, AQA '']:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f217 ''Diaphragm (thoracic), page 118, GCSE Biology; Student Book, Collins, AQA '']:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Diaphragm (thorax), page 33, GCSE Biology; The Revision Guide, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Diaphragm (thorax), page 70, GCSE Combined Science Trilogy; Biology, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Diaphragm (thorax), page 76, GCSE Biology, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe09841 ''Diaphragms (contraceptive), page 65, GCSE Combined Science; The Revision Guide, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Diaphragms (contraceptive), page 78, GCSE Biology; The Revision Guide, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Diaphragms (contraceptives), page 194, GCSE Combined Science Trilogy; Biology, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Diaphragms (contraceptives), page 230, GCSE Biology, CGP, AQA ''] ====Edexcel==== :[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Diaphragm, page 175, GCSE Physics, Pearson Edexcel ''] ====OCR====:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Diaphragms, pages 136-137, Gateway GCSE Physics, Oxford, OCR '']