Describe the action of the tricuspid valve when you squeezed the water-filled right ventricle

Tricuspid valve is a structure present between right atrium and right ventricle. It is a one way valve composed of three flaps, hence the name. Blood flows from right atrium to right ventricle via it. It also prevents back flow of blood to atrium.

If a water filled right ventricle is squeezed, it will try to flow back into the right atrium. At this moment, the flaps of tricuspid valve will move upwards in horizontal position. As a result, the valve will close and water will not flow back to the right atrium.