Across
- 4. the heart valve at the base of the aorta and the pulmonary artery
- 7. where the lungs and the blood exchange oxygen and carbon dioxide
- 8. carrying blood away from the heart
- 11. a muscular organ which pumps blood
- 12. a passage or airway in the lower respiratory tract that conducts air into the lungs
- 14. carrying air in and out of your lungs
- 15. thickest of the heart's chambers
- 16. veins that transfer oxygenated blood from the lungs to the heart
- 18. allows your chest to expand
- 20. it passes the blood to the pulmonary artery
Down
- 1. any of the minute branches into which a bronchus divides
- 2. the smallest of the blood vessels
- 3. blood vessels that carry blood from the right side of the heart through to the capillaries of the lungs
- 5. largest artery in the human body
- 6. recieves blood low in oxygen from the body
- 9. surrounds the lungs and the heart
- 10. assisting the lungs in expanding to take in air
- 13. a red body fluid
- 17. a large vein that carries blood to the heart pumps blood
- 19. recieves blood from the lungs