Excretes waste: The kidneys get rid of toxins, urea, andexcess salts. Urea is a nitrogen-based waste product of cell metabolism that is produced in the liver and transported by the blood to the kidneys.
Maintains water balance: The kidneys help maintain water and electrolyte balance in the body. They react to changes in the water level, which may increase or decrease throughout the day.
Regulates blood pressure: The kidneys help regulate blood pressure by producing angiotensin, a substance that constricts blood vessels and signals the body to retain waterand sodium when blood pressure is low.
Regulates red blood cells: The kidneys produce erythropoietin, a hormone that stimulates your bone marrow to produce more red blood cells when the bodydoes not get enough oxygen.
Regulates acid levels: Acids are products of metabolism. The kidneys help maintain proper acid-base balance to keep the body healthy.
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