Fossa ovalis (heart)
FEATURE OF THE RIGHT ATRIUM IN THE HUMAN HEART
Limbus of fossa ovalis; Limbus fossæ ovalis; Limbus fossa ovalis; Limbus fossae ovalis; Annulus ovalis; Fossa ovalis cordis; Limbus of Vieussens
The fossa ovalis is a depression in the right atrium of the heart, at the level of the interatrial septum, the wall between right and left atrium. The fossa ovalis is the remnant of a thin fibrous sheet that covered the foramen ovale during fetal development.