Limbus of fossa ovalis

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Limbus of fossa ovalis
Gray493.png
Interior of right side of heart. (Limbus fossae ovalis labeled at left, fourth from top.)
Latin limbus fossae ovalis
Gray's subject #138 531
Dorlands/Elsevier l_10/12494149

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Overview

The limbus of fossa ovalis (annulus ovalis) is the prominent oval margin of the fossa ovalis.

It is most distinct above and at the sides of the fossa; below, it is deficient.

A small slit-like valvular opening is occasionally found, at the upper margin of the fossa, leading upward beneath the limbus, into the left atrium; it is the remains of the fetal aperture between the two atria.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.



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