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: Endochondral ossification bone growth series, 1-6 of 14; PICTURE 1-Cartilage templates form early on embryonic life. Each template is covered by membrane called the perichondrium , which is composed of an outer fibrous layer and an inner chondrogenic layer. PICTURE 2-As the cartilage template g