Word: cilia
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Dates: during 1960-1969
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...cancer. Most early tests were on the backs of mice be cause the skin there is of the same cellular class as the inside of a man's lung. More recently, to study an approximation of what happens when smoke rushes past the tiny, hairlike filter system (cilia) of the human respiratory tree, the researchers have taken to using parts of the gills of hard-shell clams...
According to Fieser, the charcoal for the Lark filter was specially developed to screen out gases known to depress the action of cilia in the respiratory tract. While Larks are currently the only cigarette to use this special charcoal, there is no reason why other cigarette manufacturers could not add the substance to their filters and thereby achieve the same probable level of safety as Larks...
...cause of lung cancer is still unknown, but there is clinical evidence linking cancer with foreign matter in the respiratory system. Cilia are thin hairs that prevent such particles from lodging in the tract. The charcoal granules in the compartmentalised Lark filter adsorb such gases as hydrogen, cyanide, formaldehyde, acrolein, and ammonia, which interfere with this process...