Effect of passive smoking on the number of Clara cells in respiratory bronchiols of domestic rabbits Oryctolagus cuniculus

The study investigated the effect of the length of periods of exposure / months to passive smoking on the numbers of Clara cells in the epithelial tissues of terminal bronchiols of rabbit lungs.
Results showed significant increase in the numbers of Clara cells in rabbits exposed for two hours (10 cig./day) to passive smoking during six months.