Friday 10 May 2013


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2 comments:

  1. Unknown10 May 2013 at 08:29

    After breathe in or out the lungs contain residual volume of air reason behind it?

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    Replies
    1. speed blogs10 May 2013 at 22:51

      Residual Volume is the amount of air present in our lungs all the time.Even when we inhale and also when we exhale

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