histology of human tissue, show tracheitis and squamous metaplasia of bronchial mucosa as seen under the microscope

anatomy background biopsy bronchial cancer cell chronic clinical disease education epidermoid health healthcare hematoxylin histology human hypertrophy laboratory macro magnification medical medicine metaplasia micro microbiology microscope microscopic microscopy morphology mucosa pain panorama pathologist pathology patient photomicrograph physiology purple real research science scientific slide squamous therapy tissue tracheitis tumor zoom