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: BONE: Physiology of bone remodeling in trabecular bone-series 7 of 9; A=Mononuclear Cells -- The resorption pit is colonized by poorly differentiated mononuclear cells that smooth over the resorbed surface and deposit a cement line, which is a layer of mineralized matrix deficient in collagen fibers.