Across
- 3. Pressure : The force of blood pushing against vessel walls
- 5. : Tiny vessels where gas and nutrient exchange occurs
- 8. : Prevent backflow of blood in the heart
- 9. : Oxygen-carrying protein in red blood cells
- 12. : Muscle that helps control breathing
- 15. Rate : Number of breaths per minute
- 17. : Condition causing inflamed and narrowed airways
- 18. : Windpipe; connects throat to lungs
- 23. Cava : Largest vein in the body
- 24. : Act of breathing in air
- 25. : Tiny sacs where gas exchange happens
- 27. : Cellular process that uses oxygen to release energy
- 30. : Main organs of the respiratory system
- 33. : Vessels that carry blood away from the heart
- 34. : Voice box; houses vocal cords
- 35. : Liquid portion of blood
- 36. : Small airways inside the lungs
- 38. : Act of breathing out air
- 39. : Ion that transports carbon dioxide in the blood
Down
- 1. : Medical term for high blood pressure
- 2. : Two tubes that branch into the lungs
- 4. Blood Cells : Blood cells that fight infection
- 6. Circulation : Circulation between heart and lungs
- 7. : Largest artery in the body
- 10. Circulation : Circulation between heart and rest of the body
- 11. Dioxide : Waste gas exhaled from the lungs
- 13. : Lung infection that fills alveoli with fluid
- 14. : Throat; passage for air and food
- 16. Blood Cells : Blood cells that carry oxygen
- 19. : Condition caused by low red blood cells or hemoglobin
- 20. : Entry point for air; filters and moistens it
- 21. Node : Heart’s natural pacemaker
- 22. : Circulating fluid that transports oxygen and nutrients
- 23. : Vessels that carry blood back to the heart
- 26. Capacity : Total volume of air the lungs can hold
- 28. Arteries : Arteries that supply the heart muscle
- 29. Exchange : Transfer of oxygen and carbon dioxide in lungs
- 31. : Help form clots to stop bleeding
- 32. : Gas absorbed from the air into the blood
- 37. : Muscular organ that pumps blood