Ken2nykrauzingz
Ken2nykrauzingz Ken2nykrauzingz
  • 11-08-2016
  • Biology
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the digestive system is responsible for fighting off infections extracting energy from food delivering oxygen to the rest of the body movement

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mpanderla95
mpanderla95 mpanderla95
  • 11-08-2016
The digestive system is responsible for extracting energy from food.
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