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Type: Multiple-Choice
Category: Respiration, Digestion, and Excretion
Level: Grade 7
Author: kdfar
Last Modified: 6 years ago

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Respiration, Digestion, and Excretion Question

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Grade 7 Respiration, Digestion, and Excretion

Mechanical digestion does NOT include
  1. stomach acid.
  2. swallowing.
  3. stomach muscles.
  4. chewing.