The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the
A) foramen ovale.
B) interatrial septum.
C) coronary sinus.
D) fossa ovalis.
E) ligamentum arteriosus.

Question

Quizplus · Accepted Answer

The foramen ovale is a structure located in the interatrial septum that allows for blood flow from the right atrium to the left atrium in fetal circulation. It closes after birth to form the fossa ovalis.

The Structure That Permits Blood Flow from the Right Atrium