Medically reviewed by Richard N. Fogoros, MD The right atrium is one of the heart's upper chambers that plays a role in blood ...

The semilunar valves stop the back flow of blood into the heart ... ventricle pumps the blood through the semilunar valve, into the aorta and round the body. Deoxygenated blood from the body ...

The heart is a large muscular pump and is divided into two halves - the right-hand side and the left-hand side. The right-hand side of the heart is responsible for pumping deoxygenated blood to ...