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Type: Multiple-Choice
Category: Circulatory and Immune Systems
Level: Grade 8
Score: 1
Author: Gem221984
Last Modified: 2 months ago

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Circulatory and Immune Systems Question

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Grade 8 Circulatory and Immune Systems

Which is the site where oxygen diffuses into the blood?
  1. trachea
  2. bronchus
  3. alveoli
  4. bronchiole
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