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 6 of 9; A=Cement line -- After completing their task, the osteoclasts leave the site. A "reversal phase follows, characterized by an absence of osteoclasts and osteoblasts. Cement lines demarcate sites of interrupted, then resumed, bone formation