Across
- 4. It is the passageway for air from larynx to lungs
- 5. It contracts and relaxes when you inhale and exhale
- 9. carries blood away from the heart
- 10. What is the smallest blood vessel
Down
- 1. It branches into two tubes
- 2. It supplies oxygen and nutrients to tissues and removes waste
- 3. The epiglottis guards entrance to lungs
- 6. Where oxygen and carbon dioxide switch places
- 7. What is the tubes that branch from the tranchea
- 8. It is four chambered
- 11. It is the sponge like organs