PEIR Digital Library

Welcome to the Pathology Education Informational Resource (PEIR) Digital Library, a multidisciplinary public access image database for use in medical education.

[ stop the slideshow ]

00203208

00203208.jpg 00203207Thumbnails0020320100203207Thumbnails0020320100203207Thumbnails0020320100203207Thumbnails0020320100203207Thumbnails00203201

DIAGRAM: LUNG: Asthma: Normal airway, low magnification, alveoli; Arrows on Alveoli -- The tone of the normal airway is regulated to allow the air to pass freely through the bronchi. The inside of the airway is lined with ciliated epithelial cells that are believed to secrete a relaxant factor, epithelia