Explain the flow of blood through the heart and label the diagram (of the heart and its chambers)

The heart has 4 main chambers; the right and left atrium, and the right and left ventricle. Each receive blood and pump blood from and to different parts of the body. The right atrium receive de-oxygenated blood from the body, and pump it into the right ventricle. The right ventricle pumps blood through to the lings to pick up oxygen and thereby become oxygenated. This blood returns to the heart via the left atrium. This blood is pumped into the left ventricle which then pumps blood through to the rest of the body via the aorta. I would use a diagram here to show the flow of blood and the different chambers of the heart, as well as labeling the various valves and highlighting the importance of the thickness of the left ventricular wall.