Year 9 Biology Revision

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Across
  1. 5. organ system that acquires oxygen and removes CO2
  2. 9. respiratory organ
  3. 10. circulatory organ that pumps blood
  4. 12. organ system that transmits electrical impulses to control the body
  5. 13. organ system that defends against pathogens
  6. 17. a digestive organ
  7. 18. muscles do this to generate heat
  8. 19. group of cells with a common function
  9. 20. organ system that allows movement of the body
  10. 21. regulation of the body's internal environment
  11. 27. nervous organ
  12. 28. organ system that protects the body from the outside world
  13. 30. organ system that releases hormones
Down
  1. 1. excretory organ that filters blood
  2. 2. feedback loop that enhances the stimulus until it stops
  3. 3. excretory organ
  4. 4. organ system that allows the production of offspring
  5. 6. organ system that breaks down food for nutrients
  6. 7. organ system that transports nutrients and wastes to cells
  7. 8. produced by the endocrine system
  8. 11. skeletal component that protects soft-tissue organs
  9. 12. detect stimuli from the outside environment
  10. 14. organ system that removes wastes such as urine
  11. 15. digestive organ that uses acid to break down food
  12. 16. feedback loop that reduces the stimulus
  13. 22. organ system that protects major organs and supports movement
  14. 23. excreted by the integumentary system when the body is too hot
  15. 24. large component of the skeletal system
  16. 25. blood vessels ____ when the body becomes too cold
  17. 26. blood vessels ____ when the body becomes too hot
  18. 29. circulatory component that carries blood away from the heart