coal workers disease

coal worker pneumoconiosis silicosis respiratory occupational interstitial fibrosis miner cwp black lung dust anthracosis carbon coalworker exposure scarring personal disease silica inhaled asbestos asbestosis construction irreversible pleural breathe pain fiber mesothelium laryngeal atelectasis effusion thickening palpitations coughing diagram symptoms pulmonary alveoli chronic tissue shortness vector illustration healthy comparison complicated simple