to determine the nature and extent of pathological changes in the small airways induced by asbestos , the pathological lesions of fibrosis and pigmentation of the membranous and respiratory bronchioles and alveolar ducts in lungs obtained from necropy from a group of 36 non-asbestotic long term chrysotile miners and 36 age , sex , and smoking matched controls who had no history of exposure to dust were compared .
C0391892
alveolar ducts
C0024109
lungs