How Do We Bring Oxygen into Our Body and Get Rid of Carbon Dioxide

When the heart pumps, blood is propelled from the right ventricle into the pulmonary arteries for transport to the lungs. Pulmonary means lungs. Upon reaching the lungs and the pulmonary capillaries, carbon dioxide exits the blood and enters into the airways of our lungs. It is then removed from our body when we exhale. At the same time, oxygen enters the blood from the airways of our lungs and binds with hemoglobin in RBCs. The oxygen-containing blood leaves the lungs and travels back to the heart as part of circulation. Thus every breath you take serves to exchange gases, bringing needed oxygen into your body while removing carbon dioxide.

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