Across
- 3. This liquid needs to be kept at a very certain pH in the human body
- 5. The skeletal system is made up of _____
- 7. When you're cold, your blood protects your _______
- 8. They vibrate when you're cold
- 9. Where the nervous system passes through the back
- 12. _______ feedback keeps homeostasis
- 13. _______ is an important nutrient for bodybuilding
Down
- 1. The human leather
- 2. Part of the respiratory system
- 3. The centre of the nervous system
- 4. The passage for air to reach your lungs
- 6. The liver is a part of the _________ system
- 10. Heartbeat from your wrist or neck
- 11. We inhale oxygen and exhale carbon _______