The _____ Forms an External Boundary Between the Superior Atria

Question

The _____ forms an external boundary between the superior atria and inferior ventricles.
A) fossa ovalis
B) foramen ovale
C) coronary sulcus
D) interventricular sulcus

Accepted Answer

The coronary sulcus, also known as the atrioventricular groove, forms an external boundary between the superior atria and inferior ventricles, separating these two sections of the heart.