Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Limbus fossae ovalis
Introduction
Overview
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
External links
- Template:GPnotebook
- Template:EMedicineDictionary
- Template:UMichAtlas – “Right atrium, internal structure, anterior view”
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]