Across
- 4. A blood vessel that carries blood back to the heart
- 7. Blood cells that carry oxygen from the lungs to the body cells.
- 8. Upper chamber of the heart
- 9. The passages that direct air into the lungs
- 10. Smallest blood vessel; connects arteries and veins- is where stuff is being delivered and picked-up.
- 12. A cell fragment that plays an important part in forming scabs.
- 13. Airways in the lungs that lead from the bronchi to the alveoli.
Down
- 1. A blood cell that fights disease
- 2. tiny sacs of lung tissue specialized for the movement of gases between air and blood
- 3. Lower chamber of the heart
- 5. Allows air to pass to and from lungs (windpipe)
- 6. A blood vessel that carries blood away from the heart.
- 11. Large, flat muscle at the bottom of the chest cavity that helps with breathing