What separates the ventricles?

What separates the ventricles?

• A. Interventricular septum
• B. Interatrial septum
• C. Coronary sinus
• D. Aortic valve

Answer: (A)

The main idea is what walls separate the heart’s ventricles. That wall is the interventricular septum, a thick muscular partition that runs between the right and left ventricles. It keeps the blood from mixing as the ventricles contract, with the left ventricle sending oxygen-rich blood to the body and the right ventricle sending deoxygenated blood to the lungs. The septum isn’t just a single sheet; it has a muscular portion and a small membranous portion near the top. The other structures aren’t walls between the ventricles. The interatrial septum sits between the atria, not the ventricles. The coronary sinus is a venous channel that drains into the right atrium, not a septal wall. The aortic valve is the valve between the left ventricle and the aorta, not a barrier between the ventricles.

The main idea is what walls separate the heart’s ventricles. That wall is the interventricular septum, a thick muscular partition that runs between the right and left ventricles. It keeps the blood from mixing as the ventricles contract, with the left ventricle sending oxygen-rich blood to the body and the right ventricle sending deoxygenated blood to the lungs. The septum isn’t just a single sheet; it has a muscular portion and a small membranous portion near the top.

The other structures aren’t walls between the ventricles. The interatrial septum sits between the atria, not the ventricles. The coronary sinus is a venous channel that drains into the right atrium, not a septal wall. The aortic valve is the valve between the left ventricle and the aorta, not a barrier between the ventricles.