Body systems

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Across
  1. 1. Bring blood to the heart
  2. 4. need these to fight off diseases
  3. 8. The hollow muscular organ forming an
  4. 9. Main digestive system organ
  5. 11. passage
  6. 12. This holds in urine
  7. 13. The basic unit of life
  8. 15. Main excretory system organ
Down
  1. 2. The tube that delivers your food to
  2. 3. Main circulatory system organ
  3. 5. A dome-shaped sheet of muscle
  4. 6. Main respiratory system organ
  5. 7. Take blood away from the heart
  6. 10. Your windpipe
  7. 14. Small finger-like surfaces in small