issb general knowledge MCQ #206

Blood is purified mainly by the:

issb general knowledge MCQ #206

  1. Question 1

    Q1. Blood is purified mainly by the:

    • A) Heart
    • B) Kidneys
    • C) Lungs only
    • D) Stomach

    Answer: Kidneys

    Explanation: Kidneys filter waste from the blood. This fact often appears in ISSB academic and general knowledge sections.