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: Pathogenesis of Atherosclerosis - 6 of 13; Macrophages may also injure the overlying endothelium, allowing platelets to attack and release growth factors, including PDGF. Some of the smooth muscle cells themselves may also form and secrete growth factors, such as PDGF. Thus, endot