== Kilder/referencer ==
* [http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/Cilia.html Cilia and Flagella] {{Webarchive|url=https://web.archive.org/web/20110504080654/http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/Cilia.html |date= 4. maj 2011 }} Citat: "...For single cells, such as [[sperm]], this enables them to [[Svømme|swim]]..."
* [http://www.mhhe.com/biosci/ap/seeleyap/resp/reading4.mhtml The Effects of Cigarette Smoking on the Respiratory System] {{Webarchive|url=https://web.archive.org/web/20050209055211/http://mhhe.com/biosci/ap/seeleyap/resp/reading4.mhtml |date= 9. februar 2005 }} Citat: "...A healthy respiratory system is continuously cleansed. The mucus produced by the respiratory tubules traps dirt and disease-causing organisms, which cilia sweep toward the mouth, where it can be eliminated. Smoking greatly impairs this housekeeping. With the very first inhalation of smoke, the beating of the cilia slows..."
* [http://www.innvista.com/health/nutrition/diet/water.htm Water] {{Webarchive|url=https://web.archive.org/web/20050829221956/http://innvista.com/health/nutrition/diet/water.htm |date=29. august 2005 }} Citat: "...Water is needed in the lungs to keep air passages moist and to prevent them from drying up when the air goes in and out. In the first stages of [[astma|asthma]], mucus is secreted to protect the tissues from drying out..."
Teknologi