Respiratory & Circulatory System
Across
- 2. A thin sheet of muscles below the lungs
- 4. It has thin wall and carries poor in oxygen blood
- 6. It connect the artery and vein
- 7. It is a muscular organ to pump the blood around the body
- 8. It carries oxygen, nutrient and waste around the body
- 11. It connect the nose and lungs
- 12. Two branches from trachea
- 13. They are sponge-like organ that fill up with air when we breathe in
- 14. It is the size of our heart
Down
- 1. Takes in air that rich in oxygen
- 3. It carries rich in oxygen blood
- 5. It is an air sacs to exchange gases
- 6. The continous movement of blood around the body
- 9. Many branches of bronchi
- 10. It has hairs and mucus to trap the dirt in the air