Respiratory System

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Across
  1. 2. Flap of tissue that prevents food from entering the trachea
  2. 5. Tiny blood vessels surrounding the alveoli for gas exchange
  3. 6. Smaller air passages that branch from the bronchi inside the lungs
  4. 7. Main organ where gas exchange occurs between air and blood
  5. 8. Tiny air sacs that are the site of oxygen and carbon dioxide exchange
  6. 9. Two main branches leading from the trachea to each lung
  7. 13. Dome-shaped muscle that controls breathing movement
  8. 14. Microscopic hairs that trap dust and sweep mucus out of the airways
  9. 15. Gas that is inhaled and used by body cells to release energy
Down
  1. 1. Biological process of exchanging gases between an organism and its environment
  2. 3. Passage that connects the nasal cavity to the larynx and esophagus
  3. 4. Waste gas exhaled after respiration
  4. 10. First organ where air enters and is filtered, warmed, and moistened
  5. 11. Voice box that contains the vocal cords
  6. 12. Windpipe that connects the larynx to the bronchi