The Heart

The heart is what moves blood through the body. Blood first enters the heart at the Right Atrium from the Superior and Inferior Vena Cava. Here the blood goes through the Tricuspid valve into the Right Ventricle. On the next contraction the blood goes through the Pulmonary Valve and into the Pulmonary Trunk which splits into the right and left Pulmonary Arteries. Here is where the artery is pumping non-oxygenated blood into the lungs. After the gasses are exchanged in the lungs, (carbon dioxide for oxygen) through capillary networks, the blood goes back to the heart through the right and left Pulmonary Veins. Blood enters the Left Atrium fully oxygenated. Then the blood goes through the Bicuspid (Mitral) Valve into the Left Ventricle. Here blood is pumped into the Aorta to be distributed to the rest of the body through the Aortic Valve.