Which structural feature of the heart is a deep groove, usually filled with substantial amounts of fat, marking the border between the atria and the ventricles?
A) posterior interventricular sulcus
B) coronary sulcus
C) anterior interventricular sulcus
D) coronary sinus
E) interventricular septum

Question

Quizplus · Accepted Answer

The coronary sulcus is a deep groove that marks the border between the atria and the ventricles and is usually filled with substantial amounts of fat. The other options either refer to a groove on the surface of the heart but do not mark the border between the atria and ventricles (posterior interventricular sulcus and anterior interventricular sulcus) or are not a groove but an anatomical structure (coronary sinus and interventricular septum).

Which Structural Feature of the Heart Is a Deep Groove