science

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Across
  1. 2. a system that releases hormones
  2. 5. an organism that consists of only one cell
  3. 6. a system that takes oxygen and brings it to the parts of your body
  4. 7. a system that takes in air
  5. 10. a system that's job is to break down food
  6. 13. theory is a theory that states all cells come from pre-existing cells, cells are the basic unit of life, and all organisms are made up of
  7. 15. a system that acts as the frame for the body
  8. 19. carry oxygen
  9. 20. is a stable internal environment
  10. 24. a system that works with the skeletal system to create movement
  11. 25. a single celled organism with no nuclues
  12. 26. a system that's called the body's army
Down
  1. 1. the most important organ
  2. 3. the smallest blood vessel
  3. 4. an organ that pumps blood
  4. 8. an organ, part of the excretory, acts as a filter
  5. 9. the basic unit of life
  6. 11. a multi celled organism
  7. 12. an organ a part of the circulator
  8. 14. a part of the respiratory system, its job is to take in air
  9. 16. an organism that has more than one cell
  10. 17. a living thing
  11. 18. a system in the body that sends signals to the brain to make you feel
  12. 21. a system that expels waste
  13. 22. an organ part of the digest
  14. 23. A process where plants