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