What part of the heart act like a dam which control blood flow in heart?

The heart has four chambers: two atria (left and right) and two ventricles (left and right). The valves in the heart are responsible for controlling the flow of blood. The four valves are the tricuspid valve, the pulmonary valve, the mitral valve, and the aortic valve.

The tricuspid valve is located between the right atrium and the right ventricle. It prevents blood from flowing backward into the right atrium when the right ventricle contracts.

The pulmonary valve is located between the right ventricle and the pulmonary artery. It prevents blood from flowing backward into the right ventricle when the pulmonary artery contracts.

The mitral valve is located between the left atrium and the left ventricle. It prevents blood from flowing backward into the left atrium when the left ventricle contracts.

The aortic valve is located between the left ventricle and the aorta. It prevents blood from flowing backward into the left ventricle when the aorta contracts.

The valves in the heart work together to ensure that blood flows in the correct direction. They open and close at specific times to allow blood to flow into and out of the heart.