How is oxygen and carbon dioxide transported in human beings?

Q. How is oxygen and carbon dioxide transported in human beings?



Oxygen and carbon dioxide are transported in human beings with a dedicated gas transportation system. This system is mainly composed of following parts:

Lungs: Lungs help in breathing in oxygen rich air and breathing out carbon dioxide rich air.

Heart: Heart pumps deoxygenated blood to lungs for oxygenation and pumps oxygenated blood to different organs of body.

Veins: Veins usually carry deoxygenated blood from different body parts to the heart. One exception is the pulmonary vein which carries oxygenated blood from lungs to heart.

Arteries: Arteries usually carry oxygenated blood from heart to different parts of the body. One exception is pulmonary artery which carries deoxygenated blood from heart to lungs.

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