Respiratory System

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Across
  1. 3. The expulsion of air from the lungs; breathing out air.
  2. 5. Process of breathing.
  3. 7. A serous membrane that covers the lungs and lines the thoracic cavity.
  4. 8. Leaf-shaped structure that closes over the larynx during swallowing.
  5. 13. Small branches of the bronchi; carry air in the lungs.
  6. 15. Hairlike projections.
  7. 17. Windpipe; air tube from the larynx to the bronchi.
  8. 20. Organ of respiration located in the thoracic cavity.
Down
  1. 1. The process of taking in oxygen (inspiration) and expelling carbon dioxide (expiration) by way of the lungs and air passages.
  2. 2. ________ respiration is the exchange of carbon dioxide and oxygen between the tissue cells and the bloodstream.
  3. 4. The body system that consists of the lungs and air passages; responsible for taking in oxygen and removing carbon dioxide.
  4. 6. ________ respiration is when the cells use of oxygen and nutrients to produce energy, water, and carbon dioxide.
  5. 9. Breathing in; taking air into the lungs.
  6. 10. Cavity or air space in a bone.
  7. 11. Two main branches of the trachea; air tubes to and from the lungs.
  8. 12. The projection in the center of the face; the organ for smelling and breathing.
  9. 14. ________ respiration is the exchange of oxygen and carbon dioxide between the lungs and bloodstream.
  10. 16. Voice box, located between the pharynx and trachea.
  11. 18. Microscopic air sacs in the lungs.
  12. 19. the throat