Human Digestive System

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Across
  1. 2. ______ are used to make enzymes.
  2. 4. This type of nutrient is the main source of energy.
  3. 6. The _______ is also known as the gullet.
  4. 8. _______ speed up chemical reactions.
  5. 10. The nutrient mostly found in food such as meat, is needed for cell ______.
Down
  1. 1. The enzyme ______ digests fat into fatty acids and glycerol.
  2. 3. _____prevent the body from losing too much heat.
  3. 5. Before the body can make use of large complex molecules of food, they have to undergo ______.
  4. 7. Digestion ends in the _________.
  5. 9. The ______ contains glands that secrete gastric juice.