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