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