Biology Crossword Puzzle

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Across
  1. 3. Air that you breathe is filtered though the two openings called
  2. 4. The warmed, moistened, ad filtered air moves through a muscular tube in your upper throat called
  3. 8. Each alveolus is surrounded by a network of tiny blood vessels called
  4. 11. Means "white"
  5. 13. Found in land animals
  6. 14. Exhalation
  7. 16. They pump blood out of the heart
  8. 18. They receive blood coming into the heart
  9. 19. Refers to any infection of the lungs caused by bacteria, virus, fungi, or protozoa in rate conditions
Down
  1. 1. Means "cells"
  2. 2. Inhalation
  3. 5. Is a flap of tissue that closes the entrance to the rest of the respiratory system when you swallow
  4. 6. Is a pale yellowish liquid that is about ninety-two percent water
  5. 7. A special kind of protein containing iron
  6. 9. Allows for exchange of gases underwater
  7. 10. Is the physical action of taking in oxygen into, and releasing the waste carbon dioxide out of the lungs
  8. 12. Is the inflammation or swelling of the breathing passages, the pathway between the nose and the lungs
  9. 14. Is a long-term disease of the lungs caused by prolonged exposure to respiratory irritants like tobacco chemicals and air pollutants such as factory fumes or coal
  10. 15. Is a chronic and allergic condition that makes the breathing airways narrow and swollen, and causes them to produce extra mucus
  11. 17. Means "red"