excretory and respiratory system

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Across
  1. 1. The throat; part of both respiratory an digestive system
  2. 4. a large dome shape muscle that plays an important role in breathing
  3. 6. Tiny hair-like extensions of cells that can move together like whips
  4. 9. the windpipe; a passage though which air moves in the respiratory system
  5. 11. the process in which oxygen and glucose undergo a complex series of chemical reactions inside cells
  6. 13. monoxide a colorless odorless gas produced when substances including tobacco are burned
  7. 14. a dark sticky substance produced when tobacco burns
  8. 15. folds of connective tissue that stretch across the opening of the larynx and produce a persons voice
Down
  1. 2. a physical dependence on a substance; an intense need by the body for a substance
  2. 3. the passages that branch from the trachea and direct air to the lungs
  3. 5. the main organs of the respiratory system
  4. 7. an irritation of the breathing passages in which the small passages become narrower than normal and may be clogged with mucus
  5. 8. the voice box; located in the top part of the trachea, underneath the epiglottis
  6. 10. a drug in tobacco that speeds up the activities of the nervous system, heart, and other organs
  7. 12. Tiny sacs of lung tissue specialized for the movement of gases between the air and blood