Ella's body systems crossword

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