Across
- 4. The organ that brings in oxygen.
- 6. The system that tells the other systems to function.
- 8. The organ that send and receives electrical signals.
- 11. The organ that absorbs nutrients into the blood.
- 12. The kind of cell that carries oxygen.
- 13. The cord that transmits the signals around the body.
- 14. The system that brings in the oxygen and brings out the carbon doixide.
Down
- 1. The reactant of cellular respiration that the respiratory system brings in.
- 2. The system that brings oxygen and glucose to the cells.
- 3. The reactant of cellular respiration that the digestive system brings in.
- 5. The kind of cell that sends electrical signals.
- 7. The system that breaks down food to get nutrients.
- 9. The organ that breaks down food with acid.
- 10. The organ that pumps blood.