Human Body System Crossword Review (use .) (by Collin of chaos)

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Across
  1. 2. Carries blood back to the heart.
  2. 3. The cell that fights disease.
  3. 4. The basic unit of life.
  4. 8. The larger lung.
  5. 9. A organ that filters blood.
  6. 11. Connects vein and arteries.
  7. 12. A group of tissues working together.
  8. 14. A group of cells that work together.
  9. 16. Carries blood from the heart.
Down
  1. 1. The cell that carries oxygen.
  2. 5. The smaller lung(space taken by heart).
  3. 6. A group of organ systems working together.
  4. 7. The lower chamber of the heart.
  5. 10. A group of organs working together.
  6. 13. The organ that pumps blood.
  7. 15. The upper chamber of the heart.