Where is the Fossa Ovalis

Question

Where is the fossa ovalis?
A) left atrium
B) interatrial septum
C) right atrium
D) interventricular septum

Accepted Answer

The fossa ovalis is a depression or indentation in the interatrial septum, which separates the right and left atria of the heart. It is the remnant of the foramen ovale, a hole that existed in the fetal heart to allow blood to bypass the lungs.