Which of the following organ is responsible for blood filtration:
Correct answer: B. Kidney
- A. Liver
- B. Kidney
- C. Lungs
- D. Heart
Explanation
The kidneys filter blood through millions of nephrons, removing nitrogenous wastes and excess water to form urine while retaining useful substances. Students may choose the liver because it detoxifies blood, but it does not perform the main filtration process that produces urine.
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