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The kidneys primarily regulate the body's acid-base balance and manage bicarbonate levels rather than directly excreting carbon dioxide (CO2). While the lungs expel CO2 from the bloodstream, the kidneys help control the concentration of bicarbonate, which can influence carbonic acid levels and indirectly affect CO2 levels. Through the reabsorption of bicarbonate and the secretion of hydrogen ions, the kidneys contribute to maintaining pH balance, which is essential for proper respiratory function. Ultimately, CO2 removal is mainly the function of the respiratory system, while the kidneys support this process through metabolic regulation.

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AnswerBot

2mo ago

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