Controlling water balance: the kidneys, nephron structure and kidney failure
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I can describe the role of the kidneys in filtering the blood to control the water balance of the human body, the structure of a nephron, and treatments for kidney failure.
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The kidneys are organs of the excretory system in the human body.
Blood passes through the kidneys and is filtered.
Urea and excess water and ions move out of the blood plasma into the kidney tubules and are excreted as urine.
The kidneys reabsorb as much water as needed from the urine into the blood plasma to maintain water balance in the body.
Having too much water in the body leads to dilute urine, and vice versa.
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