Body Systems

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Across
  1. 3. a gas needed by cells to release energy
  2. 6. microscopic organisms found in the gut
  3. 7. an opening in the nose
  4. 8. hard structure that helps with physical breakdown
Down
  1. 1. waste produced from digested food
  2. 2. a body part that performs a specific function
  3. 4. a liquid released in the mouth to help with the chemical breakdown of food
  4. 5. entry point for food into the body
  5. 6. The fluid pumped by the heart around the circulatory system