Across
- 4. the trachea is also knows the the _______
- 7. tiny hairs in the nostrils
- 8. your heart is about the size of your ____
- 9. the trachea is the main ____ to the lungs
- 10. the main organ of the respiratory system
- 11. gas our body emits
- 14. the plasma is made in the _____
Down
- 1. organ essential to human speech
- 2. Chronic Obstructive Pulmonary Disease
- 3. gives color to the blood
- 5. the liquid part of the blood
- 6. hardening of arteries
- 9. tiny sacs in the lungs where gas exchange takes place
- 12. it contracts and flattens out and pull downwards when breathing
- 13. _____ blood cells help the body fight off germs