1. Deoxygenated blood from the body enters the right atrium via the superior and inferior vena cava.2. Blood flows through the tricuspid valve into the right ventricle.3. The right ventricle pumps blood through the pulmonary valve into the pulmonary artery.4. Blood travels to the lungs, where it picks up oxygen and releases carbon dioxide.5. Oxygenated blood returns to the left atrium via the pulmonary veins.6. Blood flows through the mitral (bicuspid) valve into the left ventricle.7. The left ventricle pumps blood through the aortic valve into the aorta.8. Blood is distributed to the rest of the body.