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: DIAGRAM OF A FETUS SHOWING BONES THAT UNDERGO INTRAMEMBRANOUS OSSIFICATION; Intramembranous ossification is the mechanism used to form the frontal and parietal bones, pats of the occipital and temporal bones, and the mandible and maxilla