Which organ removes chemicals from the blood and passes them as urine?

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Multiple Choice

Which organ removes chemicals from the blood and passes them as urine?

The function being tested is the body's main excretory role, forming urine from waste in the blood. The kidneys do this by filtering blood through tiny units called nephrons. They remove waste products like urea, along with excess water and electrolytes, to create urine that is then excreted from the body. The lungs, by contrast, expel waste gases such as carbon dioxide, not urine. The liver metabolizes toxins and helps convert waste for elimination, but it does not pass waste as urine directly. The heart circulates blood but does not excrete waste. So, the kidneys are the organ responsible for removing chemicals from the blood and passing them as urine.

The function being tested is the body's main excretory role, forming urine from waste in the blood. The kidneys do this by filtering blood through tiny units called nephrons. They remove waste products like urea, along with excess water and electrolytes, to create urine that is then excreted from the body. The lungs, by contrast, expel waste gases such as carbon dioxide, not urine. The liver metabolizes toxins and helps convert waste for elimination, but it does not pass waste as urine directly. The heart circulates blood but does not excrete waste. So, the kidneys are the organ responsible for removing chemicals from the blood and passing them as urine.

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