Why does bicuspid valve have two cups?

The bicuspid valve, also known as the mitral valve, has two cups or leaflets to allow for efficient blood flow from the left atrium to the left ventricle while preventing backflow. Its two-leaflet design enables it to close tightly during ventricular contraction, ensuring that blood is pumped effectively into the aorta. This structure supports the valve's function in maintaining unidirectional blood flow within the heart.