Which valve connects the left atrium to the left ventricle?

Which valve connects the left atrium to the left ventricle?

• A. Bicuspid valve
• B. Tricuspid valve
• C. Aortic valve
• D. Pulmonary valve

Answer: (A)

The valve between the left atrium and the left ventricle is the bicuspid valve, also called the mitral valve. It sits between those two chambers and opens to allow blood to move from the left atrium into the left ventricle during diastole, then closes to prevent backflow when the ventricle contracts. This is distinct from the tricuspid valve, which sits between the right atrium and right ventricle; the aortic valve, which lies between the left ventricle and the aorta; and the pulmonary valve, which lies between the right ventricle and the pulmonary artery. The mitral valve’s position is why it’s the correct answer for the connection between the left atrium and left ventricle.

The valve between the left atrium and the left ventricle is the bicuspid valve, also called the mitral valve. It sits between those two chambers and opens to allow blood to move from the left atrium into the left ventricle during diastole, then closes to prevent backflow when the ventricle contracts. This is distinct from the tricuspid valve, which sits between the right atrium and right ventricle; the aortic valve, which lies between the left ventricle and the aorta; and the pulmonary valve, which lies between the right ventricle and the pulmonary artery. The mitral valve’s position is why it’s the correct answer for the connection between the left atrium and left ventricle.