Systems

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Across
  1. 5. System: Removal of waste from homeostasis
  2. 9. Cord: Long bundle of nervous tissue
  3. 10. System: Sends signals between body parts
  4. 12. circulates blood carrying oxygen
  5. 13. Largest portion of muscle
  6. 15. Each animal has one
  7. 16. Controls movement of internal organs
  8. 17. Ventricular: second chamber of the heart
  9. 18. Bones: Relatively thin and flat protects organs
Down
  1. 1. Nares, paired external openings
  2. 2. Firm tissue that isn't as hard as bone
  3. 3. Makes up the heart
  4. 4. Uses oxygen gets rid of carbon dioxide
  5. 6. System that provides movement
  6. 7. Support and protection (vertebrae)
  7. 8. Each animal has two
  8. 11. long fiber like structures
  9. 14. "Voice box"
  10. 16. Bones: Often as big around as they are long