LIFE PROCESSES

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Across
  1. 3. air sacs in lungs for exchange of gases
  2. 6. in leaf for gas exchange
  3. 9. that speed up reactions
  4. 10. of releasing energy from food
  5. 11. internal balance in the body
  6. 13. in food and using it for energy and growth
  7. 16. in position by the body or its part
  8. 18. tissue that transports food in plants
  9. 19. of absorbed food into body tissues
Down
  1. 1. in mouth that helps digest starch
  2. 2. excretory organ in humans
  3. 3. of substances in the body
  4. 4. that prepares its own food
  5. 5. down of food into simpler forms
  6. 7. of water from aerial parts of plants
  7. 8. of food in plants through phloem
  8. 12. for gaseous exchange in humans
  9. 14. of nitrogenous waste
  10. 15. unicellular organism with pseudopodia
  11. 17. make their own food by this process