Body Systems

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Across
  1. 2. mechanical and chemical digestion of food
  2. 7. stores urine
  3. 8. smallest blood vessel
  4. 9. liquid part of blood
  5. 10. fights disease
  6. 12. upper chamber of the heart
  7. 13. lower chamber of the heart
  8. 14. forms scabs
  9. 15. carries blood back to the heart
Down
  1. 1. passages that direct air into the lungs
  2. 3. tiny sacs of lung tissue
  3. 4. helps with breathing
  4. 5. absorbs water
  5. 6. leads from the bronchi to the alveoli
  6. 11. carries blood away from the heart