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During inhalation or exhalation air is pulled towards or away from the lungs, by several cavities, tubes, and openings. The organs of the respiratory system make sure that oxygen enters our bodies and carbon dioxide leaves our bodies. The respiratory tract is the path of air from the nose to the lungs.
The Path of Carbon Dioxide Once the carbon dioxide passes through the air sacs it travels. up through the tubes in the Lungs because the Diaphragm is now relaxing (going up). The Path of Carbon Dioxide Finally the carbon dioxide goes up through the Windpipe. (Trachea) and leaves the body through the Nose or Mouth.