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Type: Multiple-Choice
Category: Circulatory and Immune Systems
Level: Grade 6
Score: 2
Author: DawnBlack
Last Modified: 18 days ago

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Circulatory and Immune Systems Question

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Grade 6 Circulatory and Immune Systems

What are capillaries?
  1. big, blue blood vessels next to the heart
  2. blood vessels that lead blood away from the heart
  3. blood vessels so small that cells have to go through them single file
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