Which structures separate the ventricles and which valves separate the atria from the ventricles?

Which structures separate the ventricles and which valves separate the atria from the ventricles?

• A. Interventricular septum; semilunar valves
• B. Interatrial septum; mitral and tricuspid valves
• C. Interventricular septum; mitral and tricuspid valves
• D. Interventricular septum; aortic and tricuspid valves

Answer: (C)

This question tests how the heart’s chambers are divided and which valves sit between the atria and ventricles. The ventricles are separated by the interventricular septum. The valves that separate the atria from the ventricles are the mitral valve on the left and the tricuspid valve on the right, the atrioventricular valves. Semilunar valves (aortic and pulmonary) handle flow from the ventricles to the great arteries and are not between the atria and ventricles. The interatrial septum would separate the atria, which isn’t the boundary in question. So the correct pairing is interventricular septum with the mitral and tricuspid valves.

This question tests how the heart’s chambers are divided and which valves sit between the atria and ventricles. The ventricles are separated by the interventricular septum. The valves that separate the atria from the ventricles are the mitral valve on the left and the tricuspid valve on the right, the atrioventricular valves. Semilunar valves (aortic and pulmonary) handle flow from the ventricles to the great arteries and are not between the atria and ventricles. The interatrial septum would separate the atria, which isn’t the boundary in question. So the correct pairing is interventricular septum with the mitral and tricuspid valves.