Across
- 4. Blood vessels that carry blood back to the heart
- 7. Blood vessels that carry blood away from the heart
- 9. The blood vessel type that has valves
- 10. Protein in red blood cells that carries oxygen
- 12. A small structure in the brainstem that controls breathing
- 14. The process of breathing air in
- 15. The windpipe, part of the respiratory system
- 19. The respiratory system’s main muscle for breathing
- 20. The tube connecting the throat to the lungs
- 22. A component of blood that helps with clotting
- 25. The main organ of the cardiovascular system
Down
- 1. The number of chambers in the human heart
- 2. The type of circulation that carries blood to the lungs
- 3. A respiratory condition that narrows the airways
- 5. The type of blood pressure measured during heart contraction
- 6. Cava The largest vein in the human body
- 7. The main artery that carries oxygenated blood from the heart
- 8. The network of blood vessels that supply the heart muscle
- 11. The thick wall that separates the left and right sides of the heart
- 13. A condition caused by blocked coronary arteries
- 16. Small air sacs in the lungs where gas exchange takes place
- 17. The upper chambers of the heart
- 18. Smallest blood vessels where gas exchange occurs
- 21. The tiny hair-like structures in the airways that move mucus
- 23. The name for the voice box
- 24. Dioxide The waste gas exhaled from the lungs