The Respiratory System

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Across
  1. 1. The gas we exhale as a waste product of metabolism
  2. 5. Also known as the throat, this passageway directs air to the trachea
  3. 6. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged
  4. 8. The voice box that also helps direct air to the lungs
  5. 10. The main organs of the respiratory system where gas exchange occurs
  6. 11. Tiny hair-like structures in the respiratory tract that trap and move particles
  7. 13. The gas we inhale that is essential for cellular respiration
  8. 14. The smaller airways that branch off from the bronchi
  9. 15. The process of breathing and exchanging gases
Down
  1. 2. The two main airways that branch from the trachea into the lungs
  2. 3. The dome-shaped muscle below the lungs that helps with breathing
  3. 4. The flap of tissue that prevents food from entering the trachea
  4. 7. Also called the windpipe, this tube connects the throat to the lungs
  5. 9. The space inside the nose that warms, moistens, and filters air
  6. 12. The protein in red blood cells that carries oxygen