Organ Systems Crossword

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Across
  1. 2. Organ system that consists of nerves, brain, and spinal cord
  2. 6. The nervous system sends ___ to the rest of the body
  3. 10. Organ system that disposes of the body's waste
  4. 11. Muscle under the lungs that controls breathing
  5. 13. A group of cells that work together to perform a specific job
  6. 14. Tiny air sacs in the lungs
  7. 15. All living things are made of _____
  8. 16. Organ system that uses blood vessels and blood to transport oxygen and nutrients to the rest of the body
  9. 17. Process by which an organism's internal environment is kept the same despite external changes
  10. 18. The respiratory system exchanges ____ and carbon dioxide with the environment
  11. 19. Vessels that carry blood TO the heart
Down
  1. 1. Organ system that provides support and protection
  2. 3. A group of organs working together to perform a specific function (2 words)
  3. 4. Muscular organ where chemical and mechanical digestion occurs
  4. 5. This organ produces bile which helps digest our food
  5. 7. Organ system that contains muscles and helps the body move
  6. 8. Place where most mechanical digestion takes place
  7. 9. Examples include stomach, brain, heart, muscles, and liver
  8. 12. A tool that makes small objects look bigger