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7th Class Science Respiration in Organisms Question Bank Self Test-7

  • question_answer
    In carrying oxygen from the atmosphere to the cells, not only respiratory system but also circulatory system is involved. In which one of the following organs oxygen enters into circulatory system from respiratory system?

    A)  Heart

    B)  Lung

    C)  Kidney

    D)  Brain

    E)  None of these

    Correct Answer: B

    Solution :


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