Digestive Sytem

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. An essential structural component of living cells and source of energy for animals (12)
  2. 8. The organic process by which food is converted into substances that can be absorbed into the body (9)
  3. 9. Any of several complex proteins that are produced by cells and act as catalysts in specific (6)

Down

  1. 1. Nutrient in meat and beans that builds muscle (7)
  2. 2. Greasy substance in food and body tissue (3)
  3. 3. A semiliquid mass of partially digested food that passes from the stomach through the pyloric (5)
  4. 4. Organic compounds containing an ___ group and a carboxylic ___ group (9)
  5. 5. Any substance that can be taken in by a green plant and used in organic synthesis (8)
  6. 6. Solid homogeneous inorganic substances occurring in nature having a definite chemical composition (7)
  7. 7. Any of a group of organic substances essential in small quantities to normal metabolism (7)