Fossa ovalis

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Interior of right side of heart. |- style="text-align: center;" class="hiddenStructure" | colspan="2" |

|- style="text-align: center; line-height: 1;" class="hiddenStructure" | colspan="2" | |- class="hiddenStructure" |Latin |colspan="2"| |- class="hiddenStructure" |[[List of subjects in Gray's Anatomy:138#Gray.27s_page_.23|Gray's]] |colspan="2"|[subject #138 ] |- class="hiddenStructure" |System |colspan="2"| |- class="hiddenStructure" |Precursor |colspan="2"| |- class="hiddenStructure" |MeSH |colspan="2"|[] |- class="hiddenStructure" |Dorlands/Elsevier |colspan="2"|[/] |}

''For the structure in the thigh, see Fossa ovalis (thigh).

Found in the right atrium of the heart, the fossa ovalis is an embryonic remnant of the foramen ovale, which normally closes shortly after birth. Failure of the foramen ovale to close results in a disorder known as patent foramen ovale.

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