Body Systems

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Across
  1. 2. carries oxygen
  2. 4. filters the blood for waste.
  3. 7. where digestion begins
  4. 8. fights off disease
  5. 9. the basic unit of structure
  6. 11. smallest blood vessel
  7. 13. organs that work together
  8. 15. liquid part of blood
Down
  1. 1. important part in making scabs
  2. 3. where most water is absorbed
  3. 5. lower part of the heart
  4. 6. tiny sacs of lung tissue
  5. 10. muscular tube connected to the mouth and stomach
  6. 12. a muscular sac
  7. 14. where most digestion starts