Limbus of fossa ovalis
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.
External links
- Template:GPnotebook
- Template:EMedicineDictionary
- Template:UMichAtlas - "Right atrium, internal structure, anterior view"