So, once again, this is the right atrium. This is our right ventricle. And the valve that connects the right atrium to our right ventricle is number one. This is the right atrio ventricular valve, also known as the tricuspid valve. Now, what the function of this valve is the following. During relaxation, valve number one is actually open and that's to make sure that the blood flows from the right atrium and into our right ventricle.