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Type: Multiple-Choice
Category: Respiration, Digestion, and Excretion
Level: Grade 9
Author: JVance
Last Modified: 7 years ago

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Respiration, Digestion, and Excretion Question

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Grade 9 Respiration, Digestion, and Excretion

Carbon dioxide diffuses from the
  1. alveoli to the capillaries.
  2. capillaries to the alveoli.
  3. capillaries to the veins.
  4. venules to the bronchi.