Human Body System Crossword Puzzle

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Across
  1. 4. blood away from heart
  2. 7. tube that connects food to the stomach
  3. 8. sac that has chemical,mechanical digestion
  4. 11. transports oxygen to the body cells
  5. 12. covers surface of small intestine
  6. 13. filters waste from blood,like urea
  7. 14. upper chamber of heart
  8. 15. take blood into heart
Down
  1. 1. important part in creating scabs
  2. 2. passage that directs air into the lungs
  3. 3. fights disease and virus for your body
  4. 5. where digestion begins
  5. 6. liquid part of blood
  6. 9. connects arteries and veins
  7. 10. lower chamber of heart