الفهرس 
Postnatal developmentOnly 14 pages are availabe for public view
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Abstract
The present work aimed to study : 1- The normal histological structure of the eipithelial lining of different parts of the respiratory airway in the adult male albino rat. 2- The postnatal development of the eipithelial lining of different parts of the respiratory airway of the albino rats at different ages. 3- The effects of the toxic air pollutants ; formaldehyde and benzene on the eipithelial lining of the respiratory airway of the adult male albino rats at different periods of exposure.