Across
- 2. _______ in the stomach kills bacteria.
- 4. Joints are held together by _______.
- 10. Voice box =
- 13. _______ provides energy for muscle contractions.
- 15. Tension in the muscle results in:
- 16. Muscle is connected to bone by what?
- 17. ______ bone tissue forms the hard outer layer.
- 19. The thyroid gland is located in the _______.
- 20. This is the primary gas inhaled by humans.
Down
- 1. Blood exits the heart through the ______.
- 3. Nerve cells are known by what common name?
- 5. Fight or Flight comes from this branch.
- 6. ______ joints have the most movement capability.
- 7. Blood is oxygenated in the _______.
- 8. Hormones are secreted by what?
- 9. The area where two bones meet is called what?
- 11. There are ______ chambers of the heart.
- 12. Blood enters the heart in the ________.
- 14. Muscles are made up primarily of what?
- 18. The _____ filters out toxins.