sophias crossword

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Across
  1. 5. what organ pumps blood around the body?
  2. 6. what is the main structure of the respiratory system?
  3. 7. what is a group of cells?
  4. 8. what is the basic unit of life of the kingdom?
  5. 10. what is one of the structures inside cells?
  6. 12. what is a force that opposes motion between two surfaces?
  7. 13. What is the control center of the body?
  8. 15. what is the basic unit of life?
Down
  1. 1. what makes energy from food for animals and plants, cells
  2. 2. what is a cell that has a nucleus?
  3. 3. what allows steady internal conditions?
  4. 4. what are single celled organisms and prokaryotes that have no nucleus?
  5. 9. What body system sends electrical signals to all other body systems?
  6. 11. what is the organ that sits n the right side of your stomach?
  7. 14. what carries oxygen?