What is one of the main functions of the kidneys?

The kidneys play a crucial role in maintaining homeostasis within the body, and one of their primary functions is to filter out toxins from the blood. The process involves removing waste products, excess salts, and harmful substances, which are then excreted in the urine. The kidneys are equipped with tiny functional units called nephrons that perform this filtration and reabsorption process, helping to regulate the body's fluid and electrolyte balance.

Through filtration, the kidneys also help in controlling blood pressure and maintaining acid-base balance, as they can adjust the levels of various substances in the blood, ensuring that the internal environment of the body remains stable. This detoxification process is vital for overall health, as it prevents the accumulation of harmful substances that could lead to serious health issues.