ogomez1 ogomez1
  • 12-07-2017
  • Health
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Air tiny air sacs through which oxygen and carbon dioxide pass in the and out of the bloodstream

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sidramehdiostozp
sidramehdiostozp sidramehdiostozp
  • 12-07-2017
The alveoli are the tiny sacs through which oxygen and carbon dioxide pass in and out of the bloodstream.

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