The Respiratory System
Across
- 3. The act of spreading or allowing to spread
- 4. A bone protects your internal organs
- 5. A large airway that leads from the trachea
- 6. Tiny blood vessels that transport blood
- 7. Without restriction or interference
- 8. A place that supplies the body with oxygen
- 11. Air sacs exchange oxygen with CO2 in blood
Down
- 1. Small air tubes connect bronchus to alveoli
- 2. It gives air to the lungs.
- 6. What you get out after breathing
- 9. What you breathe with
- 10. The principal muscle of respiration
- 12. What enters your body when you breathe