1. Shantanu Kumar
  2. Science 10
  3. Thursday, June 16 2016, 03:41 PM
Why are lungs divided into very small sac-like structures called alveoli?
Md. Shahrukh Accepted Answer
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Lungs are divided into small sacs or alveoli to increase the surface area through which respiratory exchange takes place.
  1. more than a month ago
  2. Science 10
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