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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===