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  2. Science 10
  3. Thursday, June 16 2016, 06:10 PM
Why do we need a transportation system for carrying food and oxygen from one place to another in the body?
Ravi Ranjan Accepted Answer Pending Moderation
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The food and oxygen are taken up at one place in the body of the organisms, while all parts of the body need them. This creates a need for transportation system for carrying food and oxygen from one place to another in the body.
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