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: GASTROINTESTINAL: GI: ARTERY: Effects of Hypertension on the Vessel Wall - 6 of 14; The intima is the layer of the artery wall that is closest to the plasma. It is lined with a single layer of cells called the endothelium that serves as a protective coating or barrier and a non-thrombogenic surface.