Which valve closes between the right ventricle and the pulmonary trunk?

Which valve closes between the right ventricle and the pulmonary trunk?

• A. Pulmonary semilunar valve
• B. Tricuspid valve
• C. Bicuspid valve
• D. Chordae tendinae

Answer: (A)

The valve between the right ventricle and the pulmonary trunk is the pulmonary semilunar valve. It opens to let blood flow from the right ventricle into the pulmonary trunk during ventricular contraction and closes when the ventricle relaxes, preventing blood from flowing back into the ventricle. The tricuspid valve sits between the right atrium and right ventricle, the bicuspid (mitral) valve sits between the left atrium and left ventricle, and chordae tendineae are the tendinous cords that anchor the atrioventricular valve leaflets to papillary muscles rather than acting as a valve themselves.

The valve between the right ventricle and the pulmonary trunk is the pulmonary semilunar valve. It opens to let blood flow from the right ventricle into the pulmonary trunk during ventricular contraction and closes when the ventricle relaxes, preventing blood from flowing back into the ventricle. The tricuspid valve sits between the right atrium and right ventricle, the bicuspid (mitral) valve sits between the left atrium and left ventricle, and chordae tendineae are the tendinous cords that anchor the atrioventricular valve leaflets to papillary muscles rather than acting as a valve themselves.