Across
- 3. What can your stomach acid dissolve?
- 5. How fast can a thought travel through your neurons?
- 7. How many different systems are there?
- 8. How many different sections of a heart are there?
- 9. court When flattened out, what can our lungs completely cover?
- 10. What carries blood through you?
Down
- 1. How much bacteria is there in your mouth?
- 2. Which lung is smaller?
- 4. How many bones do you have?
- 6. What are bones stronger than steel, kilo to kilo?