Therapeutics – Cardiovascular System Practice Test

Blood is pumped from the right ventricle into the pulmonary artery through the pulmonary valve, a semilunar valve located at the outflow tract of the right ventricle. It opens during systole to send blood to the lungs and closes during diastole to prevent backflow into the ventricle. This valve is different from the aortic valve (between left ventricle and aorta) and the atrioventricular valves (tricuspid between right atrium and right ventricle; mitral between left atrium and left ventricle).