Seminular valve opens to the aorta and is thus aortic semilunar value.
Valves are flaps of fibrous tissues located in the cardiac chambers between the veins. They ensure that the blood flows in a single direction (unidirectional). Flaps also prevent the blood from flowing backwards. Based on their function, valves are of two types:
Atrioventricular valves are between ventricles and atria. The valve between the right ventricle and right atrium is the tricuspid valve, and the one which is found between the left ventricle and left atrium is known as the mitral valve.
Semilunar valves are located between the left ventricle and aorta. It is also found between the pulmonary artery and right ventricle.