Blood with little oxygen is pumped from the Right Atrium through a valve to the Right Ventricle and through another valve into the Pulmonary Vein. The Pulmonary Vein sends it to the Lungs to pick up Oxygen. This lecture briefly present on three major parts of the Circulatory system: Blood Vessels – routes blood travels; Heart – pumps or pushes blood through body and Blood – carries important “ *stuff ” through body. Our body’s circulation system is responsible for sending blood, oxygen, and nutrients throughout your body. When blood flow to a specific part of your body is reduced, you may experience the symptoms of poor circulation.