PEIR Digital Library

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

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DIAGRAM: BRONCHUS: Asthma: Chronic inflammation, expanded view, cellular level, mast cell; Arrows on Mast Cells -- The inflammation and damage that occurs during the late phase of an asthma attack can result in the progressive thickening of the basement membrane, which lies under the epithelial cell layer. Bronchial lavage fluid