heart valve

A heart valve is a small, flap-like structure inside the heart that ensures blood flows in only one direction. Think of it like a one-way door: when the heart pumps blood out or pulls it in, the valve opens to allow flow and then closes to prevent backflow. This coordinated opening and closing maintain efficient circulation. There are four main valves: the mitral, tricuspid, aortic, and pulmonary valves. Proper valve function is essential for effective heart operation; when valves malfunction, it can affect blood flow and overall heart health.