What separates the left and right ventricles?

What separates the left and right ventricles?

• A. The interventricular sulci
• B. The coronary sulcus
• C. The interatrial septum
• D. The aortic valve

Answer: (A)

The separation between the left and right ventricles is provided by the interventricular septum, a thick muscular wall that runs internally to divide the two chambers. The external grooves called the interventricular sulci simply indicate where that wall lies on the heart’s surface. Other terms don’t separate the ventricles: the coronary sulcus marks the boundary between atria and ventricles on the surface, the interatrial septum separates the atria, and the aortic valve sits between the left ventricle and the aorta.

The separation between the left and right ventricles is provided by the interventricular septum, a thick muscular wall that runs internally to divide the two chambers. The external grooves called the interventricular sulci simply indicate where that wall lies on the heart’s surface. Other terms don’t separate the ventricles: the coronary sulcus marks the boundary between atria and ventricles on the surface, the interatrial septum separates the atria, and the aortic valve sits between the left ventricle and the aorta.