What is the one-way valve in the heart called?

The tricuspid valve functions as a one-way valve located between the right atrium and the right ventricle of the heart. Its primary role is to prevent the backflow of blood into the atrium when the ventricle contracts. This ensures that blood flows in the correct direction, maintaining proper circulation within the heart. The valve is made up of three cusps, which facilitate its opening and closing based on pressure changes during the cardiac cycle.

In contrast, the aortic and pulmonary valves also serve as one-way valves but are responsible for the outflow from the ventricles to the aorta and pulmonary artery respectively. The mitral valve, while acting as a one-way valve as well, is located between the left atrium and left ventricle. It is essential to recognize that the focus of the question is specifically on the valve that separates the right atrium and ventricle, making the tricuspid valve the correct answer.