Excretory, Circulatory, Digestive and Respiratory System

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Across
  1. 1. Uses enzymes to break down food
  2. 4. This system also eliminates waste from the body (unusable remains from the food you eat)
  3. 6. The specific site of external respiration
  4. 8. Carries blood toward the heart
  5. 9. site of breathing
  6. 11. This system brings in oxygen to the body and removes waste through gas exchange (carbon dioxide)
  7. 12. helps fight disease
  8. 14. the windpipe
Down
  1. 2. pathway that food moves through from ingestion to defecation
  2. 3. When you swallow
  3. 5. This system transports needed substances throughout your body and carries away waste
  4. 6. Carries oxygenated blood away from the heart
  5. 7. This system eliminates cellular waste that has been filtered from the bloodstream
  6. 10. Filters through nephrons and removes liquid waste to form urine
  7. 13. Largest organ, rids your body of water and salts when you sweat