The Human Body System

The transportation of oxygen and carbon dioxide is a very elaborate process that requires a lot of energy. As the oxygen is diffused into the lungs it enters the pulmonary vein to the left atrium to the left ventricle to the aorta and then is carried to the different places in the body. Then the oxygenated blood is transported to the body's tissues and is dropped off. Cellular respiration occurs leaving carbon dioxide as a by-product. The carbon Dioxide is carried by the red blood cells also and enters the right atrium to the right ventricle over to the pulmonary artery through the lungs where blood becomes re-oxygenated. The carbon dioxide is released through exhailation.