Respiratory System

12345678910111213
Across
  1. 3. gas that is transported by red blood cells to the whole body
  2. 6. also known as the s back of the throat
  3. 7. tube connects the nose to the lungs
  4. 8. where gaseous exchange takes place
  5. 11. where air enters the body
  6. 12. traps dust and germs
Down
  1. 1. small branches in the lungs
  2. 2. branch into smaller bronchioles
  3. 4. contracts upon inhaling
  4. 5. carbon dioxide is a _________ gas
  5. 9. main organs of the respiratory system
  6. 10. where vocal cords are found producing sound
  7. 13. blood vessels surrounding the alveoli