As we move our muscles contract and squeeze against our veins. Our veins have tiny valves that allow blood to only flow towards the heart. These valves and the contraction of muscles assist the heart in its efforts to circulate blood throughout the body. As the deoxygenated blood makes its way back to the heart it is cleaned of waste products that occur as a result of cellular activity. This is accomplished via the liver and the kidneys.
Deoxygenated blood is heavy with carbon dioxide.
Carbon dioxide is vented by the body with every breath we exhale. It is oxygenated with every breath we inhale. Next time you take a breath or feel your heart beat you will now understand a portion of the miracle that takes place within our bodies. A simplified look at how the circulatory system of the human body works. Inc. PageWise makes no representations about the content published on this site.