Frequently asked question: How does the body get rid of carbon dioxide (waste)?

Waste substances (carbon dioxide) from the cells bind to the space in the hemoglobin vacated by the oxygen. The red blood cells are then transported through the body back to your lungs, where they discharge the carbon dioxide so that it can be breathed out. So, hemoglobin both supplies fuel (oxygen) for the cells and disposes of the waste (carbon dioxide) from the cells.

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