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[[File:HeartChambers.png|right|300px|thumb|A [[diagram]] showing the 4 chambers of the [[heart]] with the '''atria''' at the top.]]
The '''atria''' are chambers in the [[heart]] where [[blood]] enters through [[vein]]s.
: Singular [[Noun]]: '''Atrium'''
: Plural [[Noun]]: '''Atria'''
===About the Atria===
: The '''atria''' are separated from the [[ventricle]]s by [[Heart Valve|heart valves]].
: The [[heart]] has two '''atria'''. A [[Right Atrium|right '''atrium''']] and a [[Left Atrium|left '''atrium''']]
: The [[Right Atrium|right '''atrium''']] receives [[deoxygentateddeoxygenated]] [[blood]] from the body though through a [[vein]] called the [[Vena Cava]] and pumps it into the [[Right Ventricle|right ventricle]].: The [[Left Atrium|left '''atrium''']] receives [[oxygentatedoxygenated]] [[blood]] from the [[lung]]s though through a [[vein]] called the [[Pulmonary Vein]] and pumps it into the [[Left Ventricle|left ventricle]]. ===References=======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=ad276ad49df77ab4b40ab4fd0fe09701 ''Atria, page 30, 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 ''Atria, page 34, GCSE Biology; The Revision Guide, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Atria, pages 52, 53, GCSE Combined Science Trilogy 1, Hodder, 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 ''Atria, pages 73-75, 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 ''Atria, pages 79-81, GCSE Biology, CGP, 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=27ad53b0283feeff7fc5ae04a9e205f58 ''Atrium, pages 114-5, 121, GCSE Biology; Student Book, Collins, AQA '']====Edexcel====:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Atrium, page 116, GCSE Combined Science, Pearson Edexcel '']:[https://www.amazon.co.uk/gp/product/1292120207/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120207&linkCode=as2&tag=nrjc-21&linkId=22455ff53961978667722edaa64c0be5 ''Atrium, page 168, GCSE Biology, Pearson, Edexcel ''] ====OCR==== :[https://www.amazon.co.uk/gp/product/0198359810/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359810&linkCode=as2&tag=nrjc-21&linkId=d768d99f1a06f7c12fab40e5aef85a55 ''Atria, page 76, Gateway GCSE Biology, Oxford, OCR '']