In fetal circulation, which structure allows blood from the right atrium to directly enter the left atrium?

A) umbilical cord
B) arterial duct
C) foramen ovale
D) venous duct
E) right ventricle

Fetal Circulation

The circulatory system in a fetus that ensures oxygen and nutrients are supplied via the placenta and helps remove waste.

Foramen Ovale

Structural feature of the fetal heart that allows for blood to move directly between the right and left atrium.

Right Atrium

The right upper chamber of the heart that receives deoxygenated blood from the body and pumps it into the right ventricle.