Final answer:
The correct option is B. The right semilunar valve, known as the pulmonary valve, connects the right ventricle to the pulmonary artery, ensuring unidirectional blood flow to the lungs for oxygenation.
Step-by-step explanation:
The right semilunar valve, also known as the pulmonary valve or the pulmonic valve, connects the right ventricle to the pulmonary artery. This valve ensures that blood flows in one direction from the right ventricle into the pulmonary artery, which then branches off into the left and right pulmonary arteries. Blood is transported to the lungs via these arteries for oxygenation before returning to the left side of the heart.
This key valve is critical as it prevents the backflow of deoxygenated blood from the pulmonary artery back into the right ventricle during ventricular relaxation (diastole). The semilunar valves, including both the pulmonary and aortic valves, are comprised of three small flaps and unlike the atrioventricular valves such as the mitral valve, do not have associated papillary muscles or chordae tendineae.