Respiratory & Circulatory System

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