Respiratory System

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Across
  1. 1. The trachea is also known as the _____
  2. 3. Normal breathing rate
  3. 6. Volume of air left in the lungs after a forceful expiration
  4. 8. The lowest section of the pharynx
  5. 9. The serous membrane that covers lungs and inside of ribcage, parietal/visceral
  6. 10. Closes off the windpipe during swallowing
  7. 13. The most amount of carbon dioxide is carried in the blood asa these ions
  8. 15. Also known as the "voice box"
  9. 16. The walls of alveolar sacs are called _____
Down
  1. 2. Tube that connects the middle ear to the throat, equalizing airier pressure
  2. 4. The frontal, maxillary, sphenoidal and ethmoidal are all ________ sinuses
  3. 5. The external nares are also called ______
  4. 7. Receptors located in the carotid & aortic bodies that sense carbon dioxide & oxygen levels
  5. 11. Embedded in the pharynx and also part of the lymphatic system
  6. 12. The inspiratory muscles include the _____ & external intercostal muscles
  7. 14. When breathing stops completely for a period of time