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Type: Multiple-Choice
Category: Respiration, Digestion, and Excretion
Level: Grade 9
Score: 1
Tags: digestive system
Author: RenaKilgore
Last Modified: 7 years ago

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Respiration, Digestion, and Excretion Question

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Grade 9 Respiration, Digestion, and Excretion

What is the function of chewing?
  1. to exercise jaw muscles
  2. to make food taste better
  3. to increase the food's surface area for digestive enzymes
  4. to improve the ability of food to pass through the intestines