Pumps blood to the body. This traffic through the heart in enforced by valves. The first two of these four, lead blood from the atriums to the ventricles. That is why they are know as the atrioventricular valves. The tricuspid, a.k.a. the right AV valve, is called so due to the three flexible flaps that close the valve once blood has rushed through.
Blood flowing from the ventricles to the body or lungs leaves through the semilunar valves.
These valves are named for the artey and vein they arise. Ont the right side of the heart is the pumlonary valves, and on the left side of the heart is the arotic valve. The right side of the heart is known as the pulmonary circuit pump . It then passes to the right ventricle by way of the tricuspib valve. From there it is pumped into the lungs via the pulmonary trunk and right semilunar valve.