Across
- 4. "branches" where the air passed from the trachea enters
- 5. "voicebox"; used for breathing, swallowing, and talking
- 7. Main organ of the circulatory system; pumps blood through the body
- 10. Main organ of the respiratory system; expand during inhalation, contract during exhalation
- 11. pathways in the body responsible for the circulation of blood
- 13. blood vessels with thin walls that allow for gas exchange and nutrient deposits in other places in the body
- 14. smaller "branches" that come from the bronchi
Down
- 1. small air sacs that inflate during inhalation; diffuse oxygen through their walls into capillaries
- 2. Gas that is needed for body to function
- 3. transport oxygen-rich blood to the rest of the body
- 6. return oxygen-poor blood back to the heart
- 8. Waste gas that exits the body
- 9. Transports oxygen to the other parts of the body and takes carbon dioxide back to the heart to be reoxygenated
- 12. airway that allows oxygen to reach lungs