Across
- 3. The throat region acting as a shared passageway for air and food.
- 4. A blood vessel that carries blood back to the heart.
- 6. Receives deoxygenated blood from the vena cava
- 8. Vein which carries oxygenated blood from the lungs to the left atrium
- 11. The main artery carrying oxygenated blood from the heart to the body
- 14. Dome-shaped muscle under lungs that contracts to pull air in.
- 15. Two main branches of the trachea directing air into each lung.
- 16. Microscopic, grape-like air sacs where oxygen and carbon dioxide exchange occurs.
- 19. The left one of these sends oxygenated blood from to the body via the aorta
- 21. Artery which carries deoxygenated blood from the heart to the lungs
- 22. Large vein carrying deoxygenated blood to the right atrium
Down
- 1. The main windpipe, a rigid tube channeling air to the chest.
- 2. A soft tissue inside the bone that produces blood cells
- 5. The voice box housing the vocal cords, sitting atop the windpipe.
- 7. Blood cells that carry oxygen from the lungs to the body cells.
- 9. Cavity which is the primary inlet for air, lined with membranes that filter out dust.
- 10. A blood vessel that carries blood away from the heart
- 12. Type of blood cell that fights disease.
- 13. Tiny blood vessels where gas and nutrient exchange occurs
- 17. Found within veins - keep blood flowing in one direction
- 18. Sends deoxygenated blood to the lungs via the pulmonary artery
- 20. The atrium which receives oxygenated blood from the pulmonary vein