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