Limbus of fossa ovalis
|Limbus of fossa ovalis|
Interior of right side of heart. (Limbus fossae ovalis labeled at left, fourth from top.)
|Latin||limbus fossae ovalis|
The limbus of fossa ovalis (anulus ovalis) is the prominent oval margin of the fossa ovalis. It is in the right atrium.
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 (foramen ovale) between the two atria.
- 637927483 at GPnotebook
- limbus+fossae+ovalis at eMedicine Dictionary
- Atlas image: ht_rt_atrium at the University of Michigan Health System - "Right atrium, internal structure, anterior view"
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