idk wtyeet this is

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Across
  1. 8. where your food goes down
  2. 9. upper chamber of heart
  3. 10. covers the inner surface of the small intestine
  4. 11. fights off viruses
  5. 12. lower chamber of heart
  6. 13. the liquid in blood
Down
  1. 1. fragment that plays an important part in fixing scars
  2. 2. intestine the small looking worm that makes food absorb
  3. 3. what you use to eat
  4. 4. stores food
  5. 5. carries oxygen from the lungs to the body cell.
  6. 6. intestine the big looking worm that absorbs water
  7. 7. smallest blood vessel
  8. 9. what carries blood away from heart
  9. 12. what carries blood back to the heart