Respiratory System

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Across
  1. 4. Voice box that contains the vocal cords
  2. 7. Body structure made of organs that work together to perform breathing
  3. 10. Two main tubes that branch from the trachea into the lungs
  4. 11. Network of air passages that branch through the lungs
  5. 12. Throat that connects the nasal cavity to the larynx and esophagus
  6. 13. Substance that prevents alveoli from collapsing
Down
  1. 1. Maximum amount of air a person can exhale after a deep breath
  2. 2. Windpipe that carries air from the larynx to the bronchi
  3. 3. Small airway branches that come off the bronchi
  4. 4. Main organs of the respiratory system used for breathing
  5. 5. Brain centers that control the rate and pattern of breathing
  6. 6. Hollow space inside the nose that warms and moistens air
  7. 8. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged
  8. 9. Thin barrier where gas exchange occurs in the lungs
  9. 12. Pressure exerted by a single gas in a mixture of gases