Which Structure is a Remnant of the Foramen Ovale

Question

Which structure is a remnant of the foramen ovale?
A)Ligamentum arteriosum
B)Tricuspid valve
C)Fossa ovalis
D)Aortic semilunar valve

Accepted Answer

The fossa ovalis is a depression in the right atrium of the heart, which is the remnant of the foramen ovale, an opening in the fetal heart that allows blood to bypass the lungs.