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 cortical bone, "cutting cone", series 3 of 3; A=Cement Line -- Although the phases of remodeling are the same, there are structural differences in the remodeling process in cortical and trabecular bone. In cortical bone, a "cutting cone" of osteoclasts often drills a tunnel through th