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      Question

      Cilia are small hair-like structures found in the human

      body. Which system of the body do they belong to?
      A Respiratory system Correct Answer Incorrect Answer
      B Digestive system Correct Answer Incorrect Answer
      C Circulatory system Correct Answer Incorrect Answer
      D Excretory system Correct Answer Incorrect Answer

      Solution

      Cilia are tiny hair-like structures located in the upper part of the respiratory tract. They help to remove dust, germs, and other harmful particles from inhaled air. Smoking can damage these cilia, leading to lung infections, cough, and even lung cancer.

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