The lungs are responsible for gas exchange, bringing oxygen into the bloodstream and removing carbon dioxide with every breath. While they play a crucial role in respiratory function and removing one specific type of waste (CO₂), they are not the organ that filters chemical toxins from the blood. That responsibility lies with the liver, which metabolizes drugs, alcohol, and environmental toxins, and with the kidneys, which help excrete waste through urine. Though the lungs do contribute to overall detoxification in the limited sense of expelling carbon dioxide, they are not capable of processing more complex or harmful chemical compounds. Confusing their role with that of the liver can lead to a misunderstanding of how the body defends itself from harmful substances. The lungs breathe, the liver cleans.