Biology Review Crossword

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Across
  1. 2. the system that removes wastes from the blood and regulates body fluids
  2. 4. a group of similar cells working together
  3. 5. the macromolecule that speeds up chemical reactions and helps with transport, communication, defense, and structure
  4. 6. two or more tissues working together
  5. 8. the system that sends electrical signals
  6. 10. when the inside of an organism is stable or approximately the same at all times
  7. 12. system the system that protects the tissues beneath it
  8. 13. the macromolecule that provides the main source of energy
  9. 14. the kind of tissue that contracts and relaxes to produce movement
  10. 16. system a group of organs working together
  11. 17. the kind of tissue that sends and receives electrical signals
  12. 19. the system that provides a frame to connect and support body parts
  13. 20. the system that returns leaked fluid
Down
  1. 1. anything that can live on its own
  2. 3. the system that absorbs oxygen and releases carobon dioxide
  3. 7. the macromolecule that transports and stores hereditary material
  4. 9. the kind of tissue that covers and protects
  5. 11. the system that pumps blood through blood vessels
  6. 13. the most basic unit of life
  7. 15. the kind of tissue that performs many functions including joining, insulating, protecting, cushioning, supporting, and transporting
  8. 18. the system that works with the skeletal system to produce movement
  9. 20. the macromolecule that provides long-term energy