Across
- 3. brings oxygen or blood to your heart
- 6. single cell life form
- 7. protests parts of your body from getting damaged
- 8. helps you breathe
Down
- 1. A large group of single-cell microorganisms
- 2. help the body fight infection and other diseases
- 3. prevents you from getting a virus by giving you a weakened version of it
- 4. soft tissuies
- 5. pumps blood through body
- 7. protects your brain