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What is the role of the kidneys in the excretion process?

Regulating body temperature

Filtering out toxins and waste products

The kidneys play a crucial role in the excretion process primarily by filtering out toxins and waste products from the blood. This function is essential for maintaining the body's internal environment, which includes regulating electrolyte balance, acid-base balance, and fluid volume. During the filtration process, waste materials such as urea, creatinine, and excess salts are removed from the bloodstream and excreted as urine. In doing so, the kidneys help to prevent the buildup of harmful substances, maintaining homeostasis and overall health.

The other options do not accurately describe the primary functions of the kidneys. They do not regulate body temperature, support immune function, or produce energy in the same way that organs like the liver or muscles might. Thus, the role of detoxification and waste removal is central to the function of the kidneys in the excretion process.

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Supporting immune function

Producing energy

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