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Type: Multiple-Choice
Category: Respiration, Digestion, and Excretion
Level: Grade 8
Author: nadstheteacher
Last Modified: 6 years ago

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Respiration, Digestion, and Excretion Question

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Grade 8 Respiration, Digestion, and Excretion

Alveoli are made of
  1. cartilage.
  2. strong muscle.
  3. thin membranes.
  4. tubes.