Across
- 3. All the living and nonliving things in the same environment
- 4. Circulate oxygen-rich blood throughout your body
- 6. Release waste off your body
- 8. A membrane-bound cell organelles that generate energy to power the cells
- 10. Regulates body activities using hormones
- 11. Delivers nutrients and oxygen to the cells in the body
Down
- 1. The smallest blood vessel in your body
- 2. A group of atoms combined together
- 5. Organelles that involves in protein
- 7. Are those required or essential for the system to perform its purpose
- 9. A living individual that contains one or more cells