Biology IGCSE

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Across
  1. 1. chemical messages passed along a synapse
  2. 3. chemical used to test for starch
  3. 5. a gap between two neurones
  4. 6. they break down dead organisms
  5. 10. 1% of the blood
  6. 11. where bile is produced
  7. 12. what insulin converts glucose into
  8. 17. performs reaction to a stimulus
  9. 18. a parasitic pathogen
  10. 20. blood vessels getting bigger when the body is too hot
  11. 21. enzyme produced by the salivary glands
  12. 22. a group of the same species of animals in an ecosystem
  13. 23. chemical that absorbs sunlight
  14. 25. a harmful chemical produced during anaerobic respiration in animals
  15. 26. a white blood cell engulfing a pathogen
  16. 28. what produces insulin?
Down
  1. 2. the movement of sugars through the plant
  2. 4. a system for the release of hormones
  3. 7. clots blood
  4. 8. prevents backflow in a vein
  5. 9. hormone released when there is a decrease in glucose in the body
  6. 13. the heart's biggest artery, on its left ventricle
  7. 14. blood on the left side of the heart
  8. 15. part of the cell that produces proteins
  9. 16. ___ arteries supply oxygen to the heart
  10. 17. chemical produced during anaerobic respiration in plants
  11. 18. keyword for veins and arteries meaning 'lungs'
  12. 19. where all chemical reactions in a cell takes place
  13. 24. muscle that sends electric current to the heart
  14. 27. foreign substance on the cell wall of a pathogen