Across
- 2. the smallest blood vessels
- 8. lead to tiny sacs called alveoli
- 10. dome-shaped muscle under the lungs
- 12. passageway from larynx to lungs
Down
- 1. carries blood away from the heart
- 3. where the exchange of oxygen and carbon dioxide takes place
- 4. the circulation in which movement of blood through the tissues of the heart occurs
- 5. branches into 2 tubes the esophagus and the trachea
- 6. the circulation that supplies nutrients to all of the tissues except for the lungs and heart
- 7. carries blood towards the heart
- 9. the circulation in which it moves blood from the heart to the lungs and back again
- 11. contains vocal cords