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The respiratory system removes carbon dioxide from the body via the exhalation of the lungs. The steps of the removal of carbon dioxide via the respiratory system are itemized below:
1. Carbon dioxide is a waste product of cellular respiration. Cellular respiration uses glucose (a sugar) and oxygen to produce water, carbon dioxide, and an energy source known as ATP.
2. The hemoglobin within red blood cells picks up the carbon dioxide.
3. Via the red blood cells, the carbon dioxide is delivered to the alveoli, then to the bronchi and into the lungs.
4. A large muscle resides below the lungs. It is called the diaphragm. When we exhale, the diaphragm pushes upward within the chest cavity. The upward movement of the diaphragm provides enough force to push the air (carbon dioxide) upward, through the trachea and out of the mouth.
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