How does the blood move through the heart?

The heart is a pump, which moves blood around your body. It has 4 areas filled with blood, called chambers and a right and left side. There are two atria and two ventricles, one of each on each side. The blood moves into the heart through a vessel called the vena cava, into the right atrium, From the right atrium, it moves into the right ventricle. Then it is pumped to the lungs to pick up oxygen and drop off carbon dioxide. From the lungs it is pumped into the left atrium, then the left ventricle, then to the rest of the body.