Across
- 1. Carry blood away from the heart
- 3. the muscle under the lungs which contracts and relaxes allowing you to breath
- 7. the gas that all the cells of your body needs
- 8. the waste product that your body lets out when you exhale
- 10. prevent the backflow of blood in the heart
Down
- 2. passage way for air from larynx to lungs
- 4. carry blood toward the heart
- 5. one of the main passageways for oxygen to enter the body
- 6. liquid tissue that supplies oxygen to all of your cells
- 9. At the end of bronchioles where oxygen and carbon dioxide take place