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  3. 7th Class
  4. Science

7th Class Science Sample Paper Science Sample Paper - 1

  • question_answer
    In our heart, there is no mixing of oxygenated and deoxygenated blood. How is it made possible?

    Answer:

    In our heart, the right side and left side are completely separated by a septum. The septum does not allows oxygenated and deoxygenated blood to mix.


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