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 8 of 9; A=Osteoblasts. Following the "reversal phase," active osteoblasts appear and synthesize type 1 collagen, ultimately forming fibers that create a thick layer of osteoid along the cement line. The osteoid is then mineralized with immature c